New York: concluded that getting a shot was still the safest way to prevent Covid-19, a new study in two countries that compare the protection of Coronavirus from previous infections and vaccination found people who were vaccinated and survived the previous battle had previous protection.
But people who were not vaccinated with the previous infection were the second, according to research, which examined infection in New York and California last summer and fell.
In the fall, when a more contagious Delta variant was taken over but the booster had not been widespread, these people had a lower diagnosis than people who were vaccinated who did not have past infections.
Control centers and prevention of disease, which released Wednesday’s research, recorded several warnings for research.
And some experts are careful about the findings and be alert about how they can be interpreted.
“The bottom line message is that from your simtomatic covid infection does produce some immunity,” Imunological said E John Wherry of the University of Pennsylvania.
“But it’s still much safer to get your immunity from vaccination than from infection.” Vaccination had long been urged even after the Covid-19 case was previously because the two types of protection were finally reduced – and there were too many unknown to only rely on previous infections, especially last past, adding Ali Ellebedy immunology at the University of Washington in St.
Louis.
“There are so many variables that you cannot control that you cannot use it as a way to say, ‘Oh, I was infected, I was protected,'” said Ellebedy.
This research falls in line with a group of small studies that find people who are not vaccinated with previous infections have a lower risk of the diagnosis or covid disease than vaccinated people who have never been infected.
The findings seemed reasonable, said Christine Petersen, an Iowa epidemiology University.
He said a vaccine developed against the previous form of Coronavirus is likely to be less and less effective against newer and mutated versions.
However, other experts say, there are a number of other factors that can be played, including whether vaccine effectiveness only fades from time to time in many people and the extent to which masks wear and other behaviors play a role in what happens.
CDC officials noted this study was carried out before the Omicron variant took over and before many Americans received a booster dose, and so it was unclear what the booster might have.
This analysis also does not resolve the risk of severe disease or death from Covid-19.
The research writer concluded the vaccination of “remains the safest strategy” to prevent infection and “everyone who qualifies must be up to date with Covid-19 vaccination.” The researchers saw infections in California and New York, who jointly accounted for around 18% of the population A.S.
They also saw Covid-19 inpatient in California.
Overall, around 70% of adults in each country are vaccinated; The other 5% are vaccinated and have previous infections.
A little below 20% is not vaccinated; And approximately 5% are not vaccinated but have past infections.
The researchers saw the Covid-19 case from the end of last May until mid-November, and calculated how often new infections occurred in each group.
Compared to people who are not vaccinated not diagnosed with Covid-19, the case level is six times in California and 4.5 times in New York on those who are vaccinated but not infected before.
They 29fold lower in California and 15 times in New York on those who have been infected but have never been vaccinated while 32.5 fold is lower in California and 20 times lower in New York on those who have been infected and vaccinated.