Friday, May 20, 2022

Vaccination significantly protects against COVID-19 hospitalization compared to pre-infection, according to CDC study

Vaccination and prior infection both help protect against new COVID-19 infections, according to a study published on Wednesday by the US Centers for Disease Control and Prevention, but vaccination only compares to natural immunity from prior infection in the hospital. Prevents recruitment.

Researchers analyzed the risk of COVID-19 infection and hospitalization among four groups of individuals: vaccination with and without prior infection and vaccination with and without prior infection. Study case data of approximately 1.1 million cases in California and New York between late May and mid-November 2021. Hospitalization data was available only from California.

Overall, the rate of COVID-19 cases and hospitalizations was highest among unvaccinated people who did not have a previous diagnosis.

First, people with prior infection had higher case rates than those who were vaccinated with no history of prior infection. As the delta variant became dominant in the US in subsequent months, it shifted and people who survived previous infections had fewer cases than those who were vaccinated alone, according to the study.

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“Experts first looked at confirmed past infections with laboratory testing until the spring of 2021, when the alpha version was dominant nationwide. Prior to the delta version, the latter compared to avoiding previous infections as a result of COVID-19 vaccination. Better protection against infection. Looking forward to the summer and fall of 2021, when Delta became dominant in this country, however, surviving past infections now provided greater protection against subsequent infections than vaccination,” Doctor. Benjamin Silk, CDC’s lead for monitoring and analysis. AP-Task Force said in a conversation with the media on Wednesday.

However, this change coincides with the decline in immunity to the vaccine in many people. The study did not factor in time from vaccination — and potentially weakened immunity — into the analysis. The study also doesn’t capture the effect of booster doses and was conducted before the emergence of the Omicron version.

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During the study period, the risk of COVID-19 hospitalization was significantly higher among those with no prior COVID-19 diagnosis than any other group.

New York State Deputy Director for Science, Dr. Eli Rosenberg, said, “Together, the totality of the evidence really suggests that both vaccination and survival of COVID are associated with increased risk of subsequent reinfection, infection, and hospitalization.” provide protection.” “Having COVID for the first time carries with it significant risks, and staying up-to-date with vaccinations and boosters is really the only safe option for preventing COVID infection and serious illness.”

The experts also noted that the characteristics of the variants change, including how well they affect immunity from prior infections.

The CDC said in a statement that it will publish additional data on COVID-19 vaccines and boosters against the flagship Omron variant later this week.


Nation World News Desk
Nation World News Desk
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