A Centers for Disease Control and Prevention (CDC) study found that Pfizer and recent COVID-19 vaccines reduced the risk of infection by 90%.
Corona Virus Vaccines It was developed using mRNA technology, such as the one in Pfizer And the Modern, “Highly effective,” at curbing infections, including asymptomatic cases, according to the findings Published Monday by the Centers for Disease Control and Prevention.
The Federal Health Agency examined results from a real-world vaccine rollout among nearly 4,000 primary-risk workers, such as healthcare workers and first responders, across six states from December 14 to March 13, 2021.
The results indicated a 90% reduced risk of infection after the participants were fully vaccinated, or in other words, two weeks after they received second vaccines developed by Pfizer or Moderna. The results also confirmed a high level of protection after just one dose; Participants’ risk of infection was reduced by 80% two weeks after the initial vaccination.
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The results were consistent with results from clinical trials conducted before vaccines received emergency clearances from the Food and Drug Administration, the CDC said.
The director of the CDC, Dr. Rochelle P. Walensky, in a statement. “These results should provide hope for the millions of Americans who receive COVID-19 vaccines every day and for those who will have the opportunity to roll up their sleeves and get vaccinated in the coming weeks. Authorized vaccines are the main tool that will help bring an end to this devastating epidemic.”
Pfizer COVID-19 vaccine is 94% effective in real-world conditions: a study
The CDC researchers praised the study design that includes a weekly PCR nasal swab test, because it provides results on infection regardless of symptoms.
“The study shows that these two mRNA vaccines can reduce the risk of all SARS-CoV-2 infections, not just symptomatic infections,” the CDC wrote in a statement. The agency stressed the importance of the ability of vaccines to reduce all infections to limit the spread of the virus.