Vaccine offers more protection against COVID-19 than natural immunity, CDC study finds


Unvaccinated individuals who had survived a earlier COVID-19 an infection had been more than 5 occasions more prone to be reinfected with the virus in comparison with those that had been totally vaccinated with the Pfizer or Moderna vaccines, in accordance with a brand new study revealed by the Centers for Disease Control and Prevention. 

The discovering comes from information published Friday within the CDC’s Morbidity and Mortality Weekly Report, inspecting information of adults hospitalized with COVID-19 signs within the company’s “VISION Network” of hospitals spanning 9 states. 

The study’s authors stated their findings confirmed “vaccine-induced immunity was more protective than infection-induced immunity” amongst sufferers who had their first bout of the illness or had been vaccinated three to 6 months earlier. 

“We now have additional evidence that reaffirms the importance of COVID-19 vaccines, even if you have had prior infection. This study adds more to the body of knowledge demonstrating the protection of vaccines against severe disease from COVID-19,” CDC Director Dr. Rochelle Walensky stated in a press release. 

Earlier this year, the CDC published data from Kentucky suggesting the unvaccinated had been more than two occasions more prone to be reinfected, in comparison with those that had been totally vaccinated. The study revealed Friday consists of information from after the surge within the fast-spreading Delta variant, which now makes up virtually all U.S. cases of the illness.

The evaluation didn’t embody adults who obtained Johnson & Johnson’s COVID-19 vaccine, who’re at present beneficial to obtain a booster shot a minimum of two months after they had been first vaccinated. 

Protection from Moderna’s vaccine “appeared to be higher” than for Pfizer’s vaccine, the CDC study’s authors famous. The increase in protection from vaccination additionally “trended higher” amongst seniors, in comparison with adults beneath 65 years previous. 

Data reported by the CDC through late August suggests round 22% of Americans age 16 and older may have antibodies to the virus from a previous an infection. Combined with immunity from the vaccines, the estimate is that just about 90% have some antibody protection.

The study’s scientists famous their findings differed from a current study in Israel that was launched as a preprint and has but to be peer-reviewed. That study prompt Israelis with “natural immunity” from a earlier case of the virus appeared to have “longer lasting and stronger protection” against a reinfection.

Unlike the Israeli study, which examined any optimistic case, the CDC’s new findings targeted particularly on information of sufferers who had been hospitalized with COVID-19 signs. The Israeli study additionally targeted on the potential of waning immunity from the vaccine, inspecting solely these vaccinated a minimum of six months in the past. 

The CDC study “focused on the early protection from infection-induced and vaccine-induced immunity, though it is possible that estimates could be affected by time. Understanding infection-induced and vaccine-induced immunity over time is important, particularly for future studies to consider,” the authors stated. 

Beyond encouraging the unvaccinated to get their photographs for better protection, research inspecting natural immunity have additionally been a spotlight as U.S. well being authorities mull potential choices to increase booster shot suggestions to more adults. 

Israeli well being officers informed the Food and Drug Administration’s vaccine advisers earlier this month that they had been analyzing information on whether or not individuals who had a “breakthrough” an infection after receiving a minimum of one dose would want a booster shot. 

“We see that they have a very good protection overall, if they have this combination of being recovered and a single dose, similar to what they have if you have a booster,” stated Dr. Ron Milo of the Weitzman Institute in Israel.

Alexander Tin

CBS News reporter masking public well being and the pandemic.