The data included in the study was collected before the Omigron wave in the United States and before boosters became widely available. The CDC says it will release additional data on Covit-19 vaccines, boosters and the Omigran variant this weekend.
“Although the epidemiology of COVID-19 may change when new variants emerge, the vaccine is a safe strategy for preventing future SARS infection, hospitalization, long-term effects, and death,” the researchers wrote.
The researchers studied Govt-19 infection and the risk of hospitalization among four groups: vaccination with and without prior infection and vaccination with and without prior infection. Case study data for approximately 1.1 million patients in California and New York between late May and mid-November 2021. Hospital-accepted data is only available from the State of California.
In general, Covid-19 status and hospitalization rates were higher among those who had not been vaccinated without a previous diagnosis.
First, those with a previous infection had higher rates of infection than those without a previous infection. This changed because the delta variant took over the US in subsequent months, and the study found that survivors of previous infections had lower infection rates than those vaccinated alone.
“Experts first saw previous infections confirmed by lab tests in the spring of 2021 when the alpha variant took hold of the country,” said Dr. Benjamin Silk, who led the Centers for Disease Control and Prevention (CDC) surveillance. Escape from a previous infection provides greater protection than subsequent infection from the vaccine.” and analysis. The European Parliament’s task force directed the communication to the media on Wednesday.
However, for many, this change coincides with a time when the immune system is weakened. The study did not analyze the timing of vaccination — and immunosuppression. The study also did not like the effect of booster doses given prior to exposure to the Omigron variant.
Throughout the study, the risk of hospitalization for Covit-19 was significantly higher among those who had not been vaccinated without a previous Covit-19 diagnosis compared to the other group.
“Overall, both vaccines and government survivors provide protection against successive re-infections, infections and hospitalizations,” said Dr. Eli Rosenberg, deputy director of science for New York State. “The presence of the Covid virus for the first time is very risky, and vaccination and up-to-date with boosters is in fact the only safe option to prevent COVID infection and serious diseases.”
Dr. William Schaffner, an epidemiologist at Vanderbilt University Medical Center, told CNN that while there is no doubt that pre-existing infection provides some protection, a vaccine will increase that protection.
“If someone with a normal goiter is vaccinated, they will have higher antibody levels than a normal infection. And we know there are higher levels of antibodies: First, you usually get longer doses. Safety, and second, the many different types of antibodies your immune system produces. Get involved in the research, said Scheffner, a vaccination consultant with the Centers for Disease Control and Prevention.
Experts note that the characteristics of the variants vary, including how much they affect the immune system from previous infections.
“The data clearly shows that the vaccine provides safe protection against COVID-19 and additional protection for previously infected individuals,” the doctor said. In addition, it shows that those who have not been vaccinated are at greater risk of hospitalization and death.” Erica Boone, a state epidemiologist with the California Department of Public Health, said in a statement. “Outside of this study, recent data on the highly infectious variant Omigran show that receiving a booster dose provides significantly additional protection against infection, hospitalization, and death.”
Correction: An earlier version of this story misrepresents the protection against hospitalization.
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