When the Delta variant dominated, vaccination and prior infection protected against Covid-19, but vaccination was safest, study finds

Correction: CDC study finds vaccination or prior infection provided protection against Covid-19 hospitalization, but vaccination is safer

Health, When The Delta Variant Dominated

1/20/2022 2:17:00 AM

Correction: CDC study finds vaccination or prior infection provided protection against Covid-19 hospitalization, but vaccination is safer

When the Delta variant was dominant in the United States, both vaccination and prior infection helped protect against Covid-19, but vaccination was the safest way to be protected, according to a study published Wednesday by the US Centers for Disease Control and Prevention.

The data included in the study was collected before the Omicron wave in the United States, and before boosters were widely available. The CDC says it will publish additional data on Covid-19 vaccines, boosters and the Omicron variant later this week."Although the epidemiology of COVID-19 might change as new variants emerge, vaccination remains the safest strategy for averting future SARS-CoV-2 infections, hospitalizations, long-term sequelae, and death," the researchers wrote.Researchers analyzed the risk of Covid-19 infection and hospitalization among four groups of individuals: vaccinated with and without prior infection and unvaccinated with and without prior infection. The study case data from about 1.1 million cases in California and New York between the end of May and mid-November 2021. Hospitalization data was available from California only. Overall, Covid-19 case and hospitalization rates were highest among unvaccinated people who did not have a previous diagnosis. Read MoreOmicron might mark the end of Covid-19's pandemic phase -- unless a certain scenario happens, Fauci saysAt first, those with a prior infection had higher case rates than those who were vaccinated with no history of prior infection. As the Delta variant became predominant in the US in later months, this shifted and people who survived a previous infection had lower case rates than those who were vaccinated alone, according to the study. "Experts first looked at previous infections confirmed with laboratory test by the spring of 2021, when the Alpha variant was predominant across the country. Before the Delta variant, Covid-19 vaccination resulted in better protection against a subsequent infection than surviving a previous infection. When looking at the summer and the fall of 2021, when Delta became the dominant in this country, however, surviving a previous infection now provided greater protection against subsequent infection than vaccination," Dr. Benjamin Silk, lead for CDC's surveillance and analytics on the Epi-Task Force, said on a call with media Wednesday.However, this shift coincides with a time of waning vaccine immunity in many people. The study did not factor the time from vaccination -- and potential waning immunity -- into the analysis. The study also does not capture the effect booster doses may have and was conducted before the emergence of the Omicron variant.Get CNN Health's weekly newsletter Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday from the CNN Health team.

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They always say the same thing, over and over again! But we appreciate their work. They said having sex is the safest 😎 I’m vaxxed to the Max and sitting at home waiting for Legends of Bezogia to be released so I can hunker down and earn crypto while playing a cool af game BEZOGE BUY NOW💃✅💥💥 No reason the bald funny man is beating you in ratings.

Fake news!!! No that's not true!! Those who recovered from Covid less likely than vaccinated to get infected. Those who recovered from Covid less likely than vaccinated to get infected during Delta bullshit my father died last week and he had the two doses of pfizer vaccination and he is 60 years old with no chronic diseases and got hospitalized and died those vaccines weakened the immune system

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Covid-19 news: Joint flu and covid-19 vaccine could be offered in 2023Today’s covid-19 news: · Single covid-19 and flu vaccine could be available in 2023, says Moderna CEO · England coronavirus restrictions might end in March · Thousands of hamsters euthanised in Hong Kong following evidence of coronavirus transmission imagine getting vaxxed when u can just get ripped Hi, I am a structural engineer from Iran who have many ideas. I have summarized some of my ideas on my twitter(I suggest look at the idea of generating electricity by gravity). I want to work with companies and investors. Do you want to cooperate? If near Qiyamah you see the real Islam spreading from the land before Khurasan, then join even if you have to crawl with naked feet over the mountains to get there. A blessed dream of Muhammad Qasim. I think he is the Imam Al-Mahdi.

Thanks for sharing Right Please read my content, It's help you to lose your weight quickly. Cnn pushing the agenda. If you've had covid your body knows it and fights it. I had covid twice prior to Omicron. April 2020. Christmas 2020. Just got omicron. Was basically asymptomatic. Had the sniffles. Only tested because I was going to see family. My body knew what it was.

You mean Natural Immunity! In Cyprus, safe pass from infection is 3 months. And you wonder why your ratings are in the toilet I hope this helps!! I know a guy, a real bad dude. he hasn't worked in 13 weeks! Seth M. once got syked out by a guy with know pants on!! His plans are to go out West and start kissing trannys, because he saw it on tik tok. its weird because hes 36. anyways great job!!

Prior Covid-19 Infection Offered Better Protection Than Vaccination During Delta WaveA prior Covid-19 infection provided greater protection than vaccination during the Delta wave last year, the CDC said, citing research from California and New York … hmmm … Lol who could've imagined... perhaps someone should've checked some biology books

And who still trusts the CDC at this point….no one! cydney432 “While there's no doubt that prior infection provides some level of protection, vaccination can boost that protection, Dr. William Schaffner, an infectious disease expert at Vanderbilt University Medical Center told CNN.” COVID19 cydney432 '’Together, the totality of the evidence suggests really that both vaccination and having survived Covid each provide protection against subsequent reinfection, infection and hospitalization,’ said Dr. Eli Rosenberg, New York state deputy director for science.” COVID19

You should really fix your headline. Your article clearly says after delta beca.e predominate. Previous infection was safer than vaccination. This is why you have 800,000 people watch a night. Previous tweet Maybe if they Covid created sores Lol Lol. Only took 2.5 years to even recognize natural immunity is a thing… that’s messed up.

Vaccination protects against Covid-19 hospitalization significantly more than prior infection, according to CDC studyBoth vaccination and prior infection help protect against new Covid-19 infections, but vaccination protects against hospitalization significantly more than natural immunity from prior infection alone, according to a CDC study Let's start saving our hospital beds for the people who really need them like heart patients and critically ill,let the COVID deniars go home and suffer. Against omicron yes (booster). Against delta, infection offers marginally better protection. Take your pick then. В России тоже самое поют.

Game over Hey this headline makes 0 sense study finds vaccination…..but vaccination is safer 🤡🤡🤡 Glad you guys are saying it now so it won’t be so hard to argue this with your sheep Uh oh, having to correct some misinformation. But I thought they only reported the truth? I’ll take my chances with nature’s vaccine

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Texas, Arizona Have Recovered All the Jobs Lost When Covid-19 HitTexas and Arizona are the latest states to recover all jobs lost at the start of the pandemic thanks to population growth, shifts by businesses and workers away from coastal urban areas WSJWhatsNow WSJ - has no credibility. Was a juror on a murder trial . Judge’s instructions-“ If someone is shown to have lied ( you slugs ) you can judge everything they say is a lie, or not .” Anyone that concludes you only lie sometimes is not paying attention.

Calif. medical workers fight to bridge the Latino COVID-19 vaccination gap Health care workers in California’s predominantly Latino neighborhoods are fighting to bridge the COVID-19 vaccination gap in their community. Meanwhile, concerns grow over the continued low vaccination rates among Latinos in the state.

What should you do if you’re still testing positive for COVID-19 after day 10?What to know about isolation, masking and more if you're still testing positive late into a COVID-19 infection. I know we all probably might have heard about Bitcoin but don't know how it works, I tried it in a week ago by a man who recommended me to Derrick_Jones39 on Twitter he guides me through and i made a return of $10500 after a week of trading, connect with him TODAYshow 7 Signs of weak immune system How to know if you have weak immune system to avoid any complications TODAYshow Get back to work and quit making excuses

(CNN) The data included in the study was collected before the Omicron wave in the United States, and before boosters were widely available. The CDC says it will publish additional data on Covid-19 vaccines, boosters and the Omicron variant later this week."Although the epidemiology of COVID-19 might change as new variants emerge, vaccination remains the safest strategy for averting future SARS-CoV-2 infections, hospitalizations, long-term sequelae, and death," the researchers wrote.Researchers analyzed the risk of Covid-19 infection and hospitalization among four groups of individuals: vaccinated with and without prior infection and unvaccinated with and without prior infection. The study case data from about 1.1 million cases in California and New York between the end of May and mid-November 2021. Hospitalization data was available from California only. Overall, Covid-19 case and hospitalization rates were highest among unvaccinated people who did not have a previous diagnosis. Read MoreOmicron might mark the end of Covid-19's pandemic phase -- unless a certain scenario happens, Fauci saysAt first, those with a prior infection had higher case rates than those who were vaccinated with no history of prior infection. As the Delta variant became predominant in the US in later months, this shifted and people who survived a previous infection had lower case rates than those who were vaccinated alone, according to the study. "Experts first looked at previous infections confirmed with laboratory test by the spring of 2021, when the Alpha variant was predominant across the country. Before the Delta variant, Covid-19 vaccination resulted in better protection against a subsequent infection than surviving a previous infection. When looking at the summer and the fall of 2021, when Delta became the dominant in this country, however, surviving a previous infection now provided greater protection against subsequent infection than vaccination," Dr. Benjamin Silk, lead for CDC's surveillance and analytics on the Epi-Task Force, said on a call with media Wednesday.However, this shift coincides with a time of waning vaccine immunity in many people. The study did not factor the time from vaccination -- and potential waning immunity -- into the analysis. The study also does not capture the effect booster doses may have and was conducted before the emergence of the Omicron variant.Get CNN Health's weekly newsletter Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday from the CNN Health team. Throughout the period of the study, risk of Covid-19 hospitalization was significantly higher among unvaccinated people with no previous Covid-19 diagnosis than any other group. "Together, the totality of the evidence suggests really that both vaccination and having survived Covid each provide protection against subsequent reinfection, infection and hospitalization," said Dr. Eli Rosenberg, New York state deputy director for science."Having Covid the first time carries with it significant risks, and becoming vaccinated and staying up-to-date with boosters really is the only safe choice for preventing COVID infection and severe disease."While there's no doubt that prior infection provides some level of protection, vaccination can boost that protection, Dr. William Schaffner, an infectious disease expert at Vanderbilt University Medical Center told CNN."If a person who's had natural Covid then gets vaccinated, they have levels of antibody that are much, much higher than after the natural infection itself. And what we know about higher levels of antibody is: one, you usually get a longer duration of protection, and number two, the variety of antibodies that your immune system produces is more diverse. The notion is that you will be better protected against a diversity of variants," said Schaffner, who is a vaccine adviser to the CDC, but was not involved in the study.Experts noted that characteristics of variants change, including how well they effect immunity from prior infections. "The data clearly shows that vaccination provides the safest protection against COVID-19 and additional protection for individuals who have had a prior infection. In addition, it shows that people who remain unvaccinated are at the greatest risk of hospitalization and death," said Dr. Erica Pan, state epidemiologist for the California Department of Public Health, said in a statement."Outside of this study, recent data on the highly contagious Omicron variant shows that getting a booster provides significant additional protection against infection, hospitalization and death."Correction: A previous version of this story incorrectly described protection against hospitalization.