The fact that a nurse from California tested positive COVID-19 more than a week after receiving the Pfizer’s coronavirus vaccine It is not unexpected, and it should not detract from immunization.
Matthew W., an emergency room nurse at two different local hospitals in San Diego, recounted in a Facebook post on December 18 that after receiving the first dose, his arm was irritated for a day, but that he suffered no further side effects.
However, six days later, on Christmas Eve, he became infected with the virus after taking a shift in the unit for those infected with COVID-19, according to the ABC report. The health worker said he felt chills and then began to suffer from muscle aches and fatigue.
Two doses of the vaccine for increased immunity
Experts on the subject and Centers for Disease Control and Prevention (CDC) clarified that for immunity to be greater, two doses of the vaccine are needed.
Christian Ramers, an infectious disease specialist at Family Health Centers in San Diego, told the aforementioned media that the nurse’s case is not unexpected.
“This is nothing unexpected. If you work with the numbers, this is exactly what we expect to happen if someone is exposed, ”Ramers said.
“We know from clinical trials of the vaccine that it will take 10 to 14 days to start developing protection with the vaccine,” added the doctor.
“We believe that the first dose gives you about 50% and you need a second dose to reach 95%,” he said.
What the CDC Says About COVID-19 Vaccines
CDC They specify on their website that it must take a few weeks for the vaccinated person to develop immunity through B lymphocytes. This information explains why the health worker was infected.
“Different types of vaccines work in different ways to provide protection, but with all types of vaccines the body is left with a supply of ‘memory’ T cells, as well as B cells that will remember how to fight that virus in the future. It generally takes a few weeks for the body to produce T lymphocytes and B lymphocytes after vaccination. Therefore, it is possible for a person to become infected with the virus that causes COVID-19 just before or just after being vaccinated, and that get sick because the vaccine did not have enough time to generate protection ”, explain from the CDC.
The CDC also details that available vaccines must be administered in two doses for greater immunity. “The first dose begins to generate protection. The second is given a few weeks later and is necessary to achieve the maximum protection offered by the vaccine. There is a vaccine in phase 3 of clinical trials that is administered in a single dose ”, they add from the Centers.
The office attached to the federal Department of Health indicates that vaccines are just one of the tools to prevent infections.
“To stop a pandemic it is necessary to use all available tools. Vaccines work with the immune system so your body is ready to fight the virus if you are exposed to it. Other measures, such as wearing face masks and social distancing, help reduce your risk of being exposed to the virus and spreading it to others. The best protection against COVID-19 will be to get vaccinated and follow the CDC’s recommendations to protect yourself and others from it. COVID-19“, read the dependency page.
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