The US Health Authority decides to leave people who have been vaccinated against Covid-19 without a mask in open and closed environments | Serum

The Centers for Disease Control and Prevention (CDC), the US Federal Health Authority, updated its recommendations on Covid-19 on Thursday (13), allowing people who You have already taken all of the doses of the vaccine Staying Unmasked In open or closed environments.

To these people It is already fully immunizedMaintaining social distancing is also no longer necessary. The new directive is not valid unless there is a specific rule that says otherwise (for example, a different state law or workplace regulation).

As reported by The New York Times, as of Wednesday (12), about 154 million people had received at least one dose of the Covid-19 vaccine, but only about a third of the population, or 117.6 million people, had received full immunization. (Two doses or one dose, depending on the type of vaccine). in Brazil, As there is no change in the directives for masks, This indicator does not reach 9%.

United States of America Currently using Pfizer / BioNTech, Moderna, and Janssen (Johnson & Johnson) vaccines.

People wear masks lined up to vaccinate against Covid-19 in Queens, New York, in February – Photo: AP Photo / Seth Wenig, Pool

The CDC says that science enabled this change. Director Rochelle Walinsky cited three surveys – one from Israel and two from the United States – showing the effectiveness of vaccines given to Americans. He also cited others about potency against variants.

The Israeli study, published in the “Journal of the American Medical Association,” showed that the vaccine was 97% effective against symptoms of Covid-19 and 86% effective against asymptomatic infection in more than 5,000 health professionals.

The science is also clear to unvaccinated people. “You are still at risk of contracting mild or severe illness, dying, or spreading disease to others. You still have to wear a mask and get vaccinated right away,” said Walinsky.

Wallinski said the requirement to wear masks while traveling – on buses, trains, airplanes and public transport – continues. Travel advisories should be updated as science provides evidence of new ways to behave in these situations.

A Kent State University student waits after receiving a coronavirus vaccine in Hudson, Ohio (USA), on April 8th – Photo: Phil Long / Archive / Reuters

There have been reports of a small number of infections among people who have been vaccinated in the United States. Wallinski notes, however, that “the resulting infection is likely to have a lower viral load, with a shorter duration and possibly a lower risk of spreading the infection to others.”

People showing symptoms of Covid-19, even those who have been vaccinated, should wear the mask again and be tested.

Eric Topol, founder of the Center for Medical Studies’ Scripps Research Translational Institute, says the CDC’s decision was possible because “it is very clear, at least with mRNA vaccines, that transmission is so rare.” He commented on a social network saying, “There are some recent studies on C-reactive protein, infection, and all (indexes) are less than 1%.”

The vaccines from Pfizer and Moderna, which are widely used in the United States, are mRNA, or messenger RNA, which carry into our body a copy of only a portion of the genetic code of the virus. It is a recipe for our body to produce a protein from a virus. The presence of this protein leads to the production of antibodies and immune memory. (See the video below)

The Pfizer Covid vaccine uses a technology called messenger RNA; See how it works

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