Global Statistics

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Updated on August 11, 2022 10:57 am
All countries
Updated on August 11, 2022 10:57 am
All countries
Updated on August 11, 2022 10:57 am

Global Statistics

All countries
Updated on August 11, 2022 10:57 am
All countries
Updated on August 11, 2022 10:57 am
All countries
Updated on August 11, 2022 10:57 am
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Are You Protected From Covid After The First Shot

A Mild Reaction To The Vaccine Is Just Your Immune System Working

How protected are you after the 1st dose of COVID-19 vaccine?

Dr. Marks says a lot of people wonder what it means if they experience side effects, such as a fever or arm rash, and if that should prevent them from getting their second dose. These mild side effects are actually just your immune system responding. They are often more pronounced after the second dose. It means you have a vigorous immune system when you get those reactions, says Dr. Marks. If people didnt feel well at the first dose, they should be prepared for that possibility again and make sure they take some extra time if they need it. If you had an allergic reaction or a very severe reaction from the first dose, you should talk to your doctor, but otherwise people should get the second dose.

At the same time, people should not worry if they feel no effects after getting the vaccine. We know from the studies, some people also have no reaction to the vaccine, says Dr. Marks. So if you do not experience these mild reactions this is not a cause for concern either.

How Long Does It Take To Build Immunity After Getting A Covid

Immunity takes a while to build up. If you had your first Covid-19 vaccine dose yesterday, then you are not protected yet. Your body needs to spend time responding to the vaccination before it can produce an effective immune response.

It seems that some protection starts to appear about 2 weeks after the first dose, and then this increases over time. But after a longer time we arent yet sure how long this protection is likely to start to fade again. So you will need a second booster dose to make sure your immune system can consolidate this protection for the long term. The benefits of the second dose start to appear after about 1 to 2 weeks.

And there are different degrees of protection: against death, against needing to go to hospital, against getting ill, and against getting infected at all. A round-up of evidence from around the world, by Public Health England, finds that one dose of the Pfizer-BioNTech or Oxford-AstraZeneca vaccines is fairly good at preventing infection and illness, and better at preventing hospitalisation or death. After a second dose, protection increases further, although at the moment theres more evidence on second doses of Pfizer-BioNTech than Oxford-AstraZeneca.

Should I Get A Second Booster Now Or Wait

If you are immunocompromised or over age 60, a second booster shot is highly recommended. While its still important to be vaccinated against the COVID-19 virus, it may not be necessary to receive a second booster shot right away for others. Because COVID-19 vaccine protection wanes, it could benefit an individual more to wait for another COVID-19 surge to maximize the benefits.

If you were infected during a previous surge, such as Omicron, there is limited data about how long your antibody level is protective against COVID-19.

Talk to your doctor about when to continue your vaccine series.

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Preclinical Trials Would Have Shown That They Didn’t Think There Was Enough Immunity After One Shot So They’ve Gone For Both Deborah Dunn

However, this early protection comes with some important caveats. First, the protection doesn’t kick in until at least day 12 until then, there was no difference between the two groups. Secondly, one dose is still significantly less protective than two. The latter is 95% effective at preventing the disease after a week.

But there is also another figure that has been circulating on the internet, and anecdotally, being fed to patients by certain doctors the suggestion that the first dose is around 90% effective. And this is where it gets a little more complicated.

The second estimate comes from the UK’s Vaccine Committee, the JCVI, who decided to calculate the efficacy of the vaccine differently. Instead of using all the data on the number of infections, including from days when the first dose hadn’t yet started to work, they only looked at days 15-21. Using this method, the efficacy of the vaccine jumps up to 89%, because it’s not being diluted by the relatively high number of infections before the vaccine begins to have an effect. Taking things even further and only looking at the first seven days after the second dose because the second dose might not have kicked in yet by then it’s 92%.

However, these calculations are controversial.

A vaccine developed to fight Ebola is the only one that uses the same technology as the Russian and Oxford-AstraZeneca Covid-19 jabs





Sputnik V

Can you skip the second vaccine dose?

How Effective Is The First Booster Shot

COVID vaccine: Does Pfizer

There is clear evidence that a third dose of the mRNA series or the first booster dose was, and still is, critical in ensuring a robust immune response against the Omicron variant for all age groups. This is in part because the immune response wanes over time and also in part because Omicron has proved to be partially effective at evading immunity from the existing COVID-19 vaccines and from prior infections.

But then the question becomes: How well is immunity from the first booster holding up over time?

The best real-time data to follow on vaccine effectiveness over time is in the UK. The UK Health Security Agency currently has follow-up data for 15 weeks after the third dose or the first booster shot. In its latest report, the effectiveness of vaccines against infection wanes significantly after a third dose.

In the UK report, vaccine effectiveness against hospitalisation is holding up much better compared to effectiveness against infection. But even protection against hospitalisation is slightly decreasing over time.

While this data is insightful, 15 weeks of follow-up data isnt very helpful in the US because many Americans had gotten their third dose up to 24 weeks ago.

The studies mentioned above pooled all age groups. But researchers know that older adults dont mount as durable an immune response as younger people. This explains why breakthrough infections have occurred at a much higher rate among people ages 65 and up.

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Other Registration And Booking Options

If you don’t have a Personal Health Number , you need to register by phone. A PHN will be created for you.

Call: | Translators are available

Seven days a week, 7 am to 7 pm | Holiday hours may be different

Outside Canada and the USA:

Telephone for the Deaf: Dial

Video Relay Services provides sign language interpretation free for registered deaf, hard of hearing or speech-impaired people.

You can register in-person at all Service BC offices.

Office hours vary by location. Check before you go.

Everyone can get vaccinated, even if you dont have a PHN or other documentation.

It doesn’t matter if you are a Canadian citizen or not. Register even if you have already received dose 1 in another location. All of your information will be kept private and will never be shared with other agencies or parts of government.

You can get a flu shot at any time before or after the COVID-19 vaccine. Find a flu clinic.

How Well Had The Vaccines Been Working

Soon after the Pfizer COVID-19 vaccine was authorized in December 2020, researchers in Israel found that a single dose was highly effective in one medical centers thousands of vaccinated health care workers. A single dose reduced the rate of infection by up to 85% after four weeks post-shot compared to those who were not vaccinated.

This real-world finding was consistent with an analysis of Pfizers clinical trial data reported in 2020 in the New England Journal of Medicine. In that study, the 52% protection from the first dose included infections that occurred in the first 12 days after vaccination, when one would not expect the vaccine to have had time to generate protective antibodies.

Another real-world study of adults ages 70 and older conducted by Public Health England in early 2021 determined that a single dose of the Pfizer vaccine was 61% effective at preventing symptomatic disease 28 days after vaccination. Two doses increased effectiveness to 85%-90%.

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How Long After Vaccination Are You Protected Against Covid

  • You are well protected against COVID-19 from 7 days to 14 days after the second vaccination. You may still get COVID-19 after the first vaccination with Pfizer, Moderna or AstraZeneca because your immune response to the virus is not yet fully developed. After the second vaccination, there is a much lower risk of becoming ill, because you are better protected. That is why it is important to get the second vaccination as well. See four reasons why the second vaccination is so important on .
  • You are also sufficiently protected against COVID-19 28 days after one vaccination with the Janssen vaccine.
  • You are also sufficiently protected against COVID-19 14 days after one vaccination with another vaccine, if you had already had COVID-19 before receiving that vaccination.

The vaccination also protects the people around you. You can still become infected if you have been vaccinated. However, you are far less likely to be contagious than if you had not been vaccinated. The main way to minimise the risk to the people around you is to wait at least 14 days after receiving your second vaccination with the Pfizer, Moderna or AstraZeneca vaccines, or at least 28 days after receiving a vaccination with the Janssen vaccine. Even after vaccination, you can still develop symptoms that could indicate COVID-19. Read more about that possibility and about testing and quarantine in the dossier on Quarantine and isolation.

Which Vaccine Will I Get

You ask, we answer: How protected are you after one shot of the COVID-19 vaccine?

You cannot usually choose which vaccine you have. When you book, you’ll only be offered appointments for vaccines that are suitable for you.

Most people can have any of the COVID-19 vaccines, but some people are only offered certain vaccines.

For example:

  • if you’re pregnant or under 40 you’ll usually be offered appointments for the Pfizer/BioNTech or Moderna vaccines
  • if you’re under 18, you’ll only be offered the Pfizer/BioNTech vaccine

You should have the same vaccine for both doses, unless you had serious side effects after your 1st dose.

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How Long Should You Quarantine Or Isolate

Stay informed about local news and weather. Get the NBC10 Boston app foriOSorAndroid and pick your alerts.

First, you’ll need to know the difference between whether you must quarantine or isolate. Those who believe they have been in contact with someone who has COVID and are unvaccinated should quarantine. Those who test positive, regardless of vaccination status, must isolate, according to the CDC.

Close contact is defined by the CDC as “someone who was less than 6 feet away from an infected person for a cumulative total of 15 minutes or more over a 24-hour period.”

Here’s the breakdown:


If you come into close contact with someone with COVID-19, you should quarantine if you are not up-to-date on COVID-19 vaccines or are unvaccinated. For these individuals, the CDC recommends you:

  • If possible, stay away from people you live with, especially people who are at higher risk for getting very sick from COVID-19, as well as others outside your home throughout the full 10 days after your last close contact with someone with COVID-19.
  • If you are unable to quarantine, you should wear a well-fitting mask for 10 days when around others at home and in public.
  • If you are unable to wear a mask when around others, you should continue to quarantine for 10 days. Avoid people who have weakened immune systems or are more likely to get very sick from COVID-19, and nursing homes and other high-risk settings, until after at least 10 days.
  • Isolation

    How do you end isolation?

    Register And Book With The Get Vaccinated System

    You can register yourself or someone else, like a parent, grandparent or child. We will never ask you for your SIN, driver’s licence number or banking and credit card details.

    Once you’ve registered, you’ll be able to book an appointment using your confirmation number. Booking an appointment online or by phone is easy, convenient and guarantees your vaccination at the clinic.

    If needed, you can easily reschedule your appointment online.

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    Why Did The Uk Decide To Extend The Gap Between Doses

    UK cases of Covid-19 were surging last December, along with hospitalisations and deaths, and there was a risk that the NHS could be overwhelmed. In light of this, health authorities decided that it would be better to give the protection of a first dose to as many people as possible, as fast as possible. That meant delaying second doses, on the grounds that they would add only limited extra protection to people who already had significant immunity from their first dose.

    This policy was recommended by the independent experts on the Joint Committee on Vaccination and Immunisation an independent expert group that advises the UK health departments and the UKs Chief Medical Officers agreed.

    Ideally, researchers would run a set of clinical trials to compare different dosing schedules and then authorities would make policy based on plenty of solid data. But in the face of a public health emergency, waiting would have cost lives. The decision was based on limited data from the vaccine trials in 2020, coupled with expert judgement about how vaccines generally work.

    Evidence that has appeared since then is, so far, vindicating that decision.

    Progress On The Novavax Vaccine

    How long will the COVID

    Another vaccine formulation that is working its way toward authorization is Novavax, a vaccine built using the spike protein of the original SARS-CoV-2 virus. The Novavax vaccine has the advantage of being similar to traditional vaccines, such as the DTaP vaccines against diphtheria, tetanus and pertussis, or the vaccines against other viral infections such as hepatitis and shingles. The Novavax vaccine has been clinically tested in South Africa, the United Kingdom and the U.S. and found to be safe and highly effective with 90% efficacy against mild, moderate and severe forms of COVID-19.

    An advisory committee to the Food and Drug Administration endorsed the Novavax vaccine in early June 2022. Now, the FDA is reviewing changes that Novavax made during its manufacturing process before making its decision to authorize the shot.

    In Australia, the Novavax vaccine was recently registered provisionally as a booster for individuals aged 18 years and over. The company is performing phase 3 clinical trials to determine if its vaccine can be used safely and effectively as a booster in people who have previously taken mRNA vaccines.

    When these new vaccines become available in the coming months, people will have significantly more options for mixing and matching vaccines in order to enhance the duration and quality of their immune protection against COVID-19.

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    Adults Ages 50 Years Or Older


  • Fully vaccinated: 2 weeks after vaccination

  • Booster dose given at least 2 months after your first dose

    Up to date: immediately after your first booster

  • Optional: If you got a Johnson & Johnson vaccine for both your primary dose and booster dose, you may get a second booster dose of Pfizer or Moderna vaccine at least 4 months after your first booster dose.
  • In most situations, Pfizer or Moderna COVID-19 vaccines are preferred over Johnson & Johnsons COVID-19 vaccine for primary and booster vaccination. Johnson & Johnson’s vaccine may still be used in some situations.

    First Covid Vaccine Dose: What Can You Do After Your First Shot

    The U.S. hit a new high for the number of daily Covid-19 vaccinations Saturday: 4 million. The record was set as vaccinations have steadily risen over recent weeks, bringing the daily average to more than 3 million.

    That means more people in the U.S. are receiving one dose of a Covid-19 vaccine every day. For the majority, who will get either the Pfizer-BioNTech or the Moderna vaccine, it’s just the first dose in three to four weeks, they’ll return for a second.

    But is a person protected after just the first shot?

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    If You Didnt Complete The Primary Series

    People vaccinated outside of the United States who have not completed the primary series as described above do not have to start the primary series over. They should get one primary series dose of an mRNA COVID-19 vaccine . If the first dose was an mRNA COVID-19 vaccine, it would be best to get the same vaccine again to complete the primary series. They should also receive all recommended boosters when eligible.

    What Should You Do If You Get Covid

    How protected are you after receiving the COVID-19 vaccination?

    If you suspect you have COVID-19 after your first vaccine shot, go and get tested like you would normally, Dr. Subramanian said. Getting an accurate test is especially important because some vaccine side effects, like fever and fatigue, can mimic some COVID-19 symptoms, so a test can help you tell for sure what’s going on. If you do have COVID-19, you’ll also need to quarantine and keep an eye on your symptoms, Dr. Subramanian added. If they’re getting worse, seek care from a healthcare provider and let them know that you’ve received your first vaccine dose.

    You’re basically following the same process as you would if you got COVID-19 without having been vaccinated. You can still have virus replicating in your nasal passages,” Dr. Subramanian explained, meaning that you can still transmit the virus to others. Don’t take it any less seriously just because you’ve gotten your first shot getting tested, wearing a mask, quarantining, and social distancing from others remain crucial.

    POPSUGAR aims to give you the most accurate and up-to-date information about the coronavirus, but details and recommendations about this pandemic may have changed since publication. For the latest information on COVID-19, please check out resources from the WHO, CDC, and local public health departments.

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