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Updated on June 23, 2022 8:27 pm
All countries
Updated on June 23, 2022 8:27 pm
All countries
Updated on June 23, 2022 8:27 pm

Global Statistics

All countries
Updated on June 23, 2022 8:27 pm
All countries
Updated on June 23, 2022 8:27 pm
All countries
Updated on June 23, 2022 8:27 pm
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Does Vaccine Stop Transmission Of Covid

Myth: All Events Reported To The Vaccine Adverse Event Reporting System Are Caused By Vaccination

Do COVID-19 vaccines prevent transmission? CU Boulder kicks off national study

FACT: Anyone can report events to VAERS, even if it is not clear whether a vaccine caused the problem. Because of this, VAERS data alone cannot determine if the reported adverse event was caused by a COVID-19 vaccination.

Some VAERS reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. Vaccine safety experts study these adverse events and look for unusually high numbers of health problems, or a pattern of problems, after people receive a particular vaccine.

Recently, the number of deaths reported to VAERS following COVID-19 vaccination has been misinterpreted and misreported as if this number means deaths that were proven to be caused by vaccination. Reports of adverse events to VAERS following vaccination, including deaths, do not necessarily mean that a vaccine caused a health problem.

Learn more about VAERS.

Let’s Stop Pretending About The Covid

As a family physician, I spend my days dispensing advice. I mean, theres the occasional cast, skin biopsy, or shot, but most of my patients are seeing me for medical counsel. Never have I been asked about one subject so much as the Covid-19 vaccines, and never have I seen so much doubt and confusion among a group of smart, well-educated people. Interpreting the reality of the effectiveness of these vaccines is complicated: it is waning with time, weakened against delta, unknown when coupled with prior infection, and may not be improved with a booster but there is new, often murky, data emerging every day. Speaking the truth about the vaccines, however, should not be that hard. We have to be willing to adapt to new data, even when it does not fit neatly into prior messaging.

Thats where our institutions went astray. I understand the desire of our public health officials, spearheaded by the CDC, to instill confidence in the Covid-19 vaccines they remain the most expedient path to minimize the suffering inflicted by this pandemic. However, by taking on the role of no-nuance vaccine cheerleaders, they left everyone in a worse situation.

Lets stop pretending the vaccines are 90% effective and breakthrough cases are uncommon.

Lets stop pretending that vaccinated people are far less likely to spread SARS-CoV-2.

Lets stop pretending that its rare for vaccinated people to develop severe Covid-19 or die.

Yes Vaccines Block Most Transmission Of Covid

The latest data show that getting a shot not only protects vaccinated individuals, it reduces the chance they can spread the virus to others.

COVID-19 vaccines have provided an opportunity to slow the spread of the virus and end the pandemic. Now scientists are trying to learn just how much the vaccines can prevent transmission from occurring at all. New data from the CDC shows that COVID-19 infections do occur in vaccinated people, but they appear exceptionally rare.

As of April 14, the Centers for Disease Control and Prevention had received reports that 5,814 fully vaccinated people had developed COVID-19 infections. Nearly half of these infections were in people at least 60 years old. Seven percent of people with breakthrough infectionsinfections that occur after complete vaccinationwere hospitalized and one percent died.

With more than 85 million people in the United States fully vaccinated against COVID-19, the CDC has been cautiously expanding guidelines about what those fully vaccinated people can safely do. The expansion has been gradual as experts awaited data on not just how well the COVID-19 vaccines prevent disease, but also whether a fully vaccinated individual could develop an infectionwithout symptomsand unknowingly pass the virus along to someone else.

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Can Pregnant Women Be Vaccinated

Although the large phase 3 trials of the Pfizer-BioNTech and Moderna Covid-19 vaccines did not include pregnant women, eligible pregnant women may be vaccinated. The two mRNA vaccines are not contraindicated during pregnancy. Pregnant women should consider the risks of Covid-19, which may be more severe in pregnant women, and the uncertain risk of vaccination. More information on the safety and efficacy of Covid-19 vaccines in pregnant women will become available over time.

What To Read Watch And Listen To About Coronavirus


New Scientist Weekly features updates and analysis on the latest developments in the covid-19 pandemic. Our podcast sees expert journalists from the magazine discuss the biggest science stories to hit the headlines each week from technology and space, to health and the environment.

The Jump is a BBC Radio 4 series exploring how viruses can cross from animals into humans to cause pandemics. The first episode examines the origins of the covid-19 pandemic.

Why Is Covid Killing People of Colour? is a BBC documentary, which investigates what the high covid-19 death rates in ethnic minority patients reveal about health inequality in the UK.

Panorama: The Race for a Vaccine is a BBC documentary about the inside story of the development of the Oxford/AstraZeneca vaccine against covid-19.

Race Against the Virus: Hunt for a Vaccine is a Channel 4 documentary which tells the story of the coronavirus pandemic through the eyes of the scientists on the frontline.

The New York Times is assessing the progress in development of potential drug treatments for covid-19, and ranking them for effectiveness and safety.

Humans of COVID-19 is a project highlighting the experiences of key workers on the frontline in the fight against coronavirus in the UK, through social media.

Coronavirus, Explained on Netflix is a short documentary series examining the coronavirus pandemic, the efforts to fight it and ways to manage its mental health toll.

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Do You Have A Question About Covid

Angela L. Rasmussen is a virologist at the Center for Global Health Science and Security at Georgetown University Medical Center. She studies the host response to infection with emerging viruses, including the coronavirus.

The Times is committed to publishing a diversity of letters to the editor. Wed like to hear what you think about this or any of our articles. Here are some tips. And heres our email: .

Follow The New York Times Opinion section on , and .

The Risk Of Vaccinated Covid Transmission Is Not Low

After my son got sick, I dived into the data, and it turns out vaccinated people can and do spread COVID

Jennifer Frazer

Jennifer Frazer, an AAAS Science Journalism Awardwinning science writer, authored The Artful Amoeba blog for Scientific American. She has degrees in biology, plant pathology and science writing.

Jennifer Frazer, an AAAS Science Journalism Awardwinning science writer, authored The Artful Amoeba blog for Scientific American. She has degrees in biology, plant pathology and science writing.

My two-year-old tested positive for COVID last month. My mind-numbing and costly project to keep him uninfected prior to his vaccinations had proven an abject failure. I was angryand surprised. During the time he was likely infected, he had only been around vaccinated people when indoors.

Although we know the absolute risk of serious illness in young children is low, there are many other causes for concern as a result of unvaccinated infection: multisystem inflammatory syndrome 00324-2/fulltext” rel=”nofollow”> brain damage, psychiatric or chronic disease later in life, and damage to smell. While Ill never know exactly who infected my son, his infection drove me to discover something that only came into focus in late October: the risk of vaccinated transmission is notlow.

If I could do things over again, I would not have allowed my son to be around even vaccinated people indoors without masks.

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Mounting Evidence Suggests Covid Vaccines Do Reduce Transmission How Does This Work

Vaccination is likely to substantially reduce virus transmission by reducing the pool of people who become infected, and reducing virus levels in people who get infected.

11 May 2021 by Jennifer Juno and Immunity and Adam Wheatley

Since COVID-19 vaccines began rolling out across the world, many scientists have been hesitant to say they can reduce transmission of the virus.

Their primary purpose is to prevent you from getting really sick with the virus, and it quickly became clear the vaccines are highly efficient at doing this. Efficacy against symptoms of the disease in clinical trials has ranged from 50% to 95% , and similar effectiveness has been reported in the real world.

However, even the best vaccines we have are not perfect, which means some vaccinated people still end up catching the virus. We call these cases breakthrough infections. Indeed, between April 10 and May 1, six people in hotel quarantine in New South Wales tested positive for COVID-19, despite being fully vaccinated.

But how likely are vaccinated people to actually pass the virus on, if they do get infected? Evidence is increasing that, not only do COVID-19 vaccines either stop you getting sick or substantially reduce the severity of your symptoms, theyre also likely to substantially reduce the chance of transmitting the virus to others.

But how does this work, and what does it mean for the pandemic?

Do Covid Vaccines Stop Transmission Here Is What We Know

AstraZeneca Vaccine May Reduce Covid Transmission on a Single Dose

First and foremost the vaccines are designed to stop people from getting severely sick and dying and both vaccines available in Australia, AstraZeneca and Pfizer, do a great job at that.

A study published in TheNew England Journal of Medicine this week, revealed two doses of Pfizer was 88 per cent effective at preventing symptomatic disease from the Delta variant. AstraZeneca was 67 per cent effective.

Both are almost 100 per cent effective in stopping death from COVID-19.

But since vaccines started being distributed across the world, scientists have been hesitant to say if they reduce transmission.

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What Is An Emergency Use Authorization

Drugs and vaccines have to be approved by the Food and Drug Administration to ensure that only safe and effective products are available to the American public. In situations when there is good scientific reason to believe that a drug is safe and is likely to treat or prevent disease, the FDA may authorize its use even if definitive proof of the efficacy of the drug is not known, especially for diseases that cause high mortality. On December 11, 2020 the FDA issued an Emergency Use Authorization for the Pfizer-BioNTech Covidâ19 Vaccine and on December 18, 2020 the FDA issued an EUA for the Moderna Covid-19 vaccine. We expect that the Pfizer-BioNTech and Moderna vaccines will receive full approval, called a Biologics License Application, in the first half of 2021.

The bar for ensuring safety of a vaccine is higher than for a therapeutic to treat an ill person. Vaccines are given to potentially millions of healthy people, unlike drugs for sick people, and loss of trust in a vaccine for SARS-CoV-2 could spill over into loss of trust in other vaccines, seriously jeopardizing public health.

Myth: The Ingredients In Covid

FACT: Nearly all the ingredients in COVID-19 vaccines are also ingredients in many foods fats, sugars, and salts.

Exact vaccine ingredients vary by manufacturer. Pfizer-BioNTech and Moderna COVID-19 vaccines also contain messenger RNA and the Johnson & Johnson/Janssen COVID-19 vaccine contains a harmless version of a virus unrelated to the virus that causes COVID-19. These give instructions to cells in your body to create an immune response. This response helps protect you from getting sick with COVID-19 in the future. After the body produces an immune response, it discards all the vaccine ingredients just as it would discard any information that cells no longer need. This process is a part of normal body functioning.

COVID-19 vaccines do NOT contain ingredients like preservatives, tissues , antibiotics, food proteins, medicines, latex, or metals.

Learn more about what ingredients are and are not in Pfizer-BioNTech, Moderna, or Johnson & Johnson/Janssen COVID-19 vaccines.

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How Long Youll Be Protected For

We dont yet know how long youll be protected but will continue to review data as it becomes available.

Current evidence suggests that after two doses protection against severe disease, including hospital and ICU admission, remains high, including for the Delta variant, but that antibody levels decline over time.

What Are The Side Effects Of The Pfizer

Waiting for a COVID

The best information on the side effects of the Pfizer-BioNTech and Moderna mRNA vaccines comes from the large phase 3 trials that served as the basis for the Emergency Use Authorizations. The most common side effects of both vaccines are what is called reactogenicity. These are expected side effects and caused by local inflammation at the site of injection or more generalized reactions such as fever and muscle aches. For both the Pfizer-BioNTech and Moderna vaccines, these reactogenic side effects were mild to moderate, occurred up to two days after vaccination, and do not have any long-term consequences. For the Pfizer mRNA vaccine, the most common side effects were soreness or redness at the site of injection , fatigue , headache , muscle pain , chills , joint pain , and fever . Side effects following receipt of the Moderna mRNA vaccine were similar but with slightly different frequencies. The most common side effects were soreness or redness at the site of injection , fatigue , headache , muscle pain , joint pain , and chills .

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Vaccinated People Can Contract And Transmit Delta

Although fully vaccinated people were less likely to contract an infection, when they did whats known as a breakthrough infection they can transmit the Delta variant at a similar level as unvaccinated people.

Researchers found that 25 percent of household contacts exposed to a fully vaccinated person in the household contracted an infection themselves.

Of those exposed to an unvaccinated household member, 23 percent contracted an infection.

Breakthrough infections in fully vaccinated people can efficiently transmit infection in the household setting, wrote the study authors.

Researchers suspect this has to do with the coronavirus replicating similarly in vaccinated and unvaccinated people at least at the start of the infection.

As part of the study, researchers also measured the viral load how much virus is in the body of people who contracted an infection.

The peak viral load was similar for both vaccinated and unvaccinated people. It was also similar for people with an infection with different variants.

However, there was a slight increase in viral load with increasing age. This suggests a weaker immune response in older people.

The Future Still Looks Bright

Despite the uncertainty posed by the variants, the overall picture right now is reassuring, Dean says.

These vaccines have really exceeded expectations in so many ways, and its just an enormous value that they can keep you from getting sick but also keep you from transmitting to others, she says. Nothing is 100 percent, but I think people can understand the big reduction and the value of that. It changes how I think about what I want to do in a big way.

But that doesnt mean throwing caution to the wind, Morrison says.

If youre vaccinated, you can pretty much assume that you are protected against severe disease and very likely protected against enough infection to transmit, but because we have these variants emerging and the fact that were not even close to herd immunity, people should still be taking precautions, Morrison says.

Interacting with other vaccinated people without masks makes sense, but she also agrees with the CDC recommendation for vaccinated people to visit without masks or social distancing only with low-risk unvaccinated people in a single household. With so many infections still occurring daily, that limitation further reduces the likelihood of vaccinated people picking up and spreading infections from an unvaccinated home.

The more vaccinations increase, the more everyones risk of infection drops, Dean says.

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Can You Contract A Serious Case Of Covid

The vaccines approved for use in Spain Pfizer-BioNTech, Moderna, Oxford-AstraZeneca and Janssen are not 100% effective, meaning it is possible for vaccinated people to develop a serious case of Covid-19. But the large majority of serious cases are being recorded among the unvaccinated. According to data from the regions, six in 10 coronavirus patients in intensive care in Spain are unvaccinated. People who are immunized have 10 times more protection against developing serious illness.

George Floyds Great Niece Cried Daddy Ive Been Hit After Being Shot In Bed

Scientists still researching whether vaccine prevents COVID-19 transmission

For those who are not exhibiting symptoms, the CDC guidance states that these individuals should be considered contagious up to two days before their positive Covid test.

Among the traditional Covid symptoms of coughing, fever, and loss of taste and smell, the CDC says another symptom can be a pale, gray, or blue-colored tinge on your skin, lips, or nail beds.

The CDC recommends waiting five days after exposure to get a Covid test, or soon after symptoms occur.

“If symptoms occur, individuals should immediately quarantine until a negative test confirms symptoms are not attributable to Covid-19,” the guidance states.

Even if you’ve had Covid once before and are fully vaccinated, the CDC advises wearing a mask in public as immunity does not last forever and it is possible to get infected twice or more.

A triple-shot is effective against the Omicron variant, which has swiftly become the most dominant in circulation.

However, of Omicron cases, between 10 and 15 percent are reinfections, Professor Neil Ferguson told BBC Radio 4’s Today program.


There is a clearly established path now between when an individual is exposed to the virus and how long they may feel ill.

Though a string of positive studies does suggest that Omicron is milder than its Delta variant counterpart, one should remain alert nonetheless.

Stage two is around two or three days with no symptoms presenting yet.


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