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Another encouraging news is that people who received only one of the two required doses of these vaccines protected 80% of symptoms from infection in the first two weeks after vaccination. effectiveness.
A study conducted by the US Centers for Disease Control and Prevention (CDC) from December 14 to March 12 of this year examined the effectiveness of these two vaccines in the follow-up of 3,950 participants in six states.
“This study shows that our national vaccination efforts are working,” said CDC Director Rochelle Walensky.
“Vaccines approved against COVID-19 mRNA [informacinės RNR] provided real and significant protection against infection in our country to health workers, special service workers and other front-line workers needed in real conditions ”, he emphasized.
One of the main advantages of this study was that the participants themselves took swabs of the nasal cavity every week to examine them, whether they had any symptoms or not.
These results complement the growing evidence that vaccines protect not only against the onset of symptoms but also against the infection itself, making these drugs an important tool to help slow the spread of the pandemic coronavirus.
Photo by Scanpix / Pfizer / BioNTech Coronavirus Vaccine
Participants included doctors, nurses, paramedics, and other healthcare workers from Arizona, Florida, Minnesota, Oregon, Texas, and Utah.
Of these, 2,479 (62.8%) received the two recommended doses of mRNA-based vaccines and 477 (12.1%) received only one dose.
Three of the participants in the two-dose study had coronavirus infection. This corresponds to 0.04 cases per thousand people per day, compared to 0.19 cases per thousand people per day for an injection and 1.38 cases per unvaccinated person.
After adjusting the model for the study site, the efficacy of single-dose protection was estimated to be 80% for those vaccinated and 90% for both doses.
The study authors said they were unable to assess the effectiveness of each drug individually due to the small number of infections.
This study continues and researchers will now focus on cases where the virus has been able to infect vaccinated people to better understand why this is happening.
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