Why are some people positive with COVID after the vaccine?

This happened to Democrat MP Stephen Lynch of Massachusetts. He came up positive for COVID-19 after taking a second dose of Pfizer vaccine. Hall of Fame's basketball coach, Rick Pitino, was also positive after taking the first dose. There are several reasons why they came up positive, writes CNN.

According to the U.S. Centers for Disease Control and Prevention, vaccine takes several days to a few weeks to function. You can be positive about testing before the vaccine works.

“takes some time to develop an immune response”, said Robert Salata, director of the Roe Green University Hospital Centre for Travel and Global Health Medicine in Cleveland - USA.

“After 14 days, the first dose of Pfizer vaccine was about 52 percent effective in preventing the disease”, Salata, who was a leading researcher of Pfizer vaccines at his hospital, said.

While, Stephanie Bancell, executive director of the Moderna company, says the first dosage can provide a protection, but at the moment “has no data to prove it”.

After the vaccine, you can still be tested positively because the vaccine is not 100 percent effective. Two vaccines approved by the United States are very effective, but do not provide full protection.

Pfizer vaccine was 95 percent effective in preventing disease in clinical trials after people received two doses. The other Moderna vaccine was 94 percent effective in preventing disease in people who received two doses in clinical trials.

Vaccination prevents the disease, but it is not yet clear whether and to what extent the vaccine prevents infection.

The data is less obvious if vaccines prevent the virus from infecting us and if we can have an asimtomatic cases. This is still being studied “, said William Schaffner, an infectious disease specialist and professor of preventive medicine at the Department of Health Policy at Vanderbilt University.

“As we have seen, these vaccines prevent the disease, the development of serious forms of the disease,” said Namande Bumpus, director of the Department of Pharmacology and Medieval Science at “Johns Hopkins” University.

However, the focus on efficiency does not offer a complete mirror, since you can still be touched by COVID, but these cases are apparently even less serious than those forms of disease that develop in unaccompanied people, and that is really important”, he said.

Vaccinators are still studying whether vaccines only prevent the development of serious forms of the disease or completely protect them from infections.

If you're asmptomatic, you can still be positive about COVID-19. It also means that even if you are vaccinated, you can still spread the disease, so even the vaccinated people will still have to wear masks. A person can be an asimptotic host and have a virus in his nose, so that when he breathes, speaks, or sneezes, the coronary can still transmit to others.

The vaccines don't function retroactively. You could be positive because you were infected before you took the vaccine and you didn't know it yet. This happened to some health workers in a study published by the U.S. Centers for Disease Control and Prevention.

The study showed that 22 out of 4,081 vaccinated health care workers resulted positive for COVID-19 after they took the first dose.

One of the authors of the study, Eyal Leek from the Sheba Medical Centre in Israel, said it was clear that some of the workers who produced positive “were actually infected with coronary before taking the first dose”.

There are concerns that certain variants that spread to the United States may be less sensitive to the protection provided by vaccines. Initial laboratory data shows that vaccines should provide protection, and public health management want to vaccinate as many people as possible in order to limit the chances of mutation in the virus.

Anti - vaccine manufacturers COVID-19 said they are testing to determine whether vaccines operate against new variants and are also working in improvers that would provide additional protection against new coronary variants.

It's possible that within a year you will receive the flu vaccine on the one hand and the compensation of the COVID vaccine on the other. We'll have to adapt to what this virus is doing. And we have the capacity to continue with the virus, even to prevent it”, William Schaffner said.