After injection, the vaccine particles bump into cells and fuse to them, releasing mRNA. If, later on, the person comes into contact with SARS-CoV-2 virus, their immune system will recognise it and be ready to defend the body against it.
No, the Covid vaccine will not cause a positive test result for a Covid PCR or antigen rapid test. This is because these tests check for active disease and not whether an individual is immune or not. However, because the Covid vaccine prompts an immune response, vaccinated people usually test positive in an antibody serology test that measures Covid immunity in an individual.
The vaccine will be given in 2 doses. The second dose must be administered 21 days 3 weeks after the first dose. You will be advised when exactly to return for your second dose. Covid vaccination offers good protection within 2 to 3 weeks of the first dose. Experts therefore believe that immunity from Covid vaccines will last a long time, though it is not known yet whether a booster shot will be required. Although immunocompromised people people with weakened immune systems may not respond as well to the vaccine, there are no particular safety concerns.
It is safe in people with immunocompromise. Immunocompromised people, including those living with HIV, should be vaccinated as they have a higher risk of severe illness from Covid, including a higher risk of death. Pregnant women when vaccinated create antibodies to the virus and pass those to their unborn baby through the placenta. Pregnant people are at increased risk for severe illness from Covid Pregnant women with Covid disease are also 2 to 3 times more likely to have their babies early than women without Covid and might be at increased risk of other adverse pregnancy outcomes.
Pregnant women with underlying clinical conditions are at even higher risk of suffering serious complications from Covid For these reasons, it is recommended that pregnant people get vaccinated and are to be treated as priority cases. The vaccine can be given at any stage during pregnancy. There is no reason to delay a pregnancy after Covid vaccination. In addition, Covid vaccines do not affect the fertility of women or men. Covid vaccines are thought not to be a risk to lactating people or their breastfeeding babies.
Actually, mothers were shown to pass antibodies to their newborns through breast milk. Therefore, lactating people can receive a Covid vaccine. This includes simultaneous administration of Covid vaccine and other vaccines on the same day, as well as co-administration within 14 days. People should be offered vaccination regardless of their history of symptomatic or asymptomatic Covid infection.
Learn more about demographic information for people 16 years and older external icon who participated in the trials. Clinical trials for the Pfizer-BioNTech vaccine in people 12—15 years old included people from the following racial and ethnic, age, and sex categories:.
Learn more about demographic information for people 12—15 years old external icon who participated in the trials. Skip directly to site content Skip directly to page options Skip directly to A-Z link. Section Navigation. Important update: Healthcare facilities. Learn more. To maximize protection from the Delta variant and prevent possibly spreading it to others, get vaccinated as soon as you can and wear a mask indoors in public if you are in an area of substantial or high transmission.
Updated Oct. Minus Related Pages. Who Should Get Vaccinated. The Pfizer-BioNTech vaccine is recommended for people 12 years and older. If you have had a severe allergic reaction anaphylaxis or an immediate allergic reaction , even if it was not severe, to any ingredient in the Pfizer-BioNTech COVID vaccine such as polyethylene glycol , you should not get this vaccine.
If you had a severe or immediate allergic reaction after getting the first dose of a Pfizer-BioNTech COVID vaccine , you should not get a second dose of this vaccine. A severe allergic reaction is one that needs to be treated with epinephrine or EpiPen or with medical care. An immediate allergic reaction means a reaction within 4 hours of exposure, including symptoms such as hives, swelling, or wheezing respiratory distress. Type of Ingredient. Frank A. Angela Hwang. Group President, Pfizer Biopharmaceuticals Group.
Payal Sahni. New Stories. The U. Europe has become the epicentre of the pandemic again, prompting some governments to consider re-imposing unpopular lockdowns in the run-up to Christmas and stirring debate over whether vaccines alone are enough to tame COVID More than , U. Israel's pandemic advisory board on Wednesday backed administering Pfizer's and BioNTech's COVID vaccine to children age , health officials said, as a fourth wave of infections subsides nationwide.
Albert Bourla, the CEO of Pfizer, has not been arrested for fraud, contrary to a report by a website that has a history of publishing false information. Some countries are limiting the use of COVID shots based on so-called mRNA technology to younger people following reports of possible rare cardiovascular side-effects. Updated to remove a line that linked external checks investigating comparisons between ivermectin and a Pfizer-developed drug - not molnupiravir.
Guinea will begin vaccinating children aged against COVID with a consignment of Pfizer and Moderna vaccines on Wednesday, the health ministry said. Pfizer Inc has applied for approval from Japan's health ministry to use COVID vaccines on children aged 5 to 11, it said in a statement released on Wednesday.
Pfizer Inc plans to seek Brazil's authorization to use its COVID vaccine in children aged 5 to 11 years, the country's health regulator Anvisa said on Tuesday after a meeting with the U. France's public health authority has recommended people under 30 be given Pfizer's Comirnaty COVID vaccine when available instead of Moderna Inc's Spikevax jab, which carried comparatively higher risks of heart-related problems.
It is exactly a year since Pfizer's announcement of a breakthrough on its experimental COVID vaccine but from emerging markets to airline stocks, many of the trades that were expected to benefit from economies reopening have underwhelmed. Quote and financial data from Refinitiv. Fund performance data provided by Lipper. All quotes delayed a minimum of 15 minutes.
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