US-developed Pfizer and Moderna vaccines are 90% effective in fighting off the COVID-19 virus in a ‘real word’ setting, according to a new federal study.
The research – published in Morbidity and Mortality Weekly Report journal by the Centers for Disease Control and Prevention (CDC) – saw an 80% decrease in COVID-19 infection risk for people who received the first of two jabs from vaccines developed by BioNTech SE and Moderna Inc.
The report says immunity to the virus emerged 14 days after receiving the jab.
After receiving the second dose with a two-week interval, the immunity of those vaccinated rose by 90%, which backs the result of earlier clinical studies conducted on the said mRNA vaccines.
In a statement, CDC Director Rochelle Walensky said these ‘authorized mRNA vaccines’ provide protection from the virus, especially for frontliners who are constantly fighting against the infection.
“The authorized mRNA COVID-19 vaccines provided early, substantial real-world protection against infection for our nation’s healthcare personnel, first responders, and other frontline essential workers,” Walensky said.
The study observed at least 4,000 health care workers, frontline responders, and essential workers from eight locations in the U.S., particularly in the states of Arizona, Florida, Minnesota, Oregon, Texas, and Utah, from December 2020 to March 2021.
According to the CDC, volunteers were subjected to regular check-ups and were monitored through e-mail and text messages. Besides this, they also underwent weekly nasal swab testing.
In this pool, 62 percent or 2,961 have been fully or partially vaccinated with either Pfizer and Moderna’s COVID jab. Meanwhile, 989 participants remained unvaccinated – 205 of which have already tested positive for the virus.
In the partially immunized group, only eight tested positive for the virus. Meanwhile, only three contracted COVID-19 in the fully immunized population.
On the other hand, the CDC saw 161 infections in the unvaccinated bracket.
“These findings indicate that authorized mRNA COVID-19 vaccines are effective for preventing SARS-CoV-2 infection, regardless of symptom status, among working-age adults in real-world conditions,” the American public health agency said.
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