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Breakthrough Infections in Vaccinated People Less Likely to Cause ‘Long COVID’

14 Sep 2021

There’s no question that vaccines are making a tremendous difference in protecting individuals and whole communities against infection and severe illness from SARS-CoV-2, the coronavirus that causes COVID-19. And now, there’s yet another reason to get the vaccine: in the event of a breakthrough infection, people who are fully vaccinated also are substantially less likely to develop Long COVID Syndrome, which causes brain fog, muscle pain, fatigue, and a constellation of other debilitating symptoms that can last for months after recovery from an initial infection.

COVID-19 Infected Many More Americans in 2020 than Official Tallies Show

07 Sep 2021

At the end of last year, you may recall hearing news reports that the number of COVID-19 cases in the United States had topped 20 million. While that number came as truly sobering news, it also likely was an underestimate. Many cases went undetected due to limited testing early in the year and a large number of infections that produced mild or no symptoms. Now, a recent article published in Nature offers a more-comprehensive estimate that puts the true number of infections by the end of 2020 at more than 100 million [1]. That’s equal to just under a third of the U.S. population of 328 million. This revised number shows just how rapidly this novel coronavirus spread through the country last year. It also brings home just how timely the vaccines have been—and continue to be in 2021—to protect our nation’s health in this time of the pandemic.

Vaccines prevented up to 140,000 COVID-19 deaths in U.S.

24 Aug 2021

Three highly effective COVID-19 vaccines are available in the U.S. These vaccines have been shown to slow the spread of the virus and reduce COVID-19 deaths. About half of the population has been fully vaccinated as of August 2021. But vaccination rates have varied across the country, with some states proceeding much faster than others.

U.S. to Advise Boosters for Most Americans 8 Months After Vaccination

18 Aug 2021

The Biden administration has decided that most Americans should get a coronavirus booster vaccination eight months after they received their second shot, and could begin offering third shots as early as the third week of September, according to administration officials familiar with the discussions.

How gut microbes could drive brain disorders

13 Aug 2021

Scientists are starting to work out how the gut microbiome can affect brain health. That might lead to better and easier treatments for brain diseases.

Why Parents Still Hesitate to Vaccinate Their Children Against COVID-19

15 Dec 2021

As of early December, more than 2.3 million children aged 5 to 11 years had developed COVID-19 and 209 had died. Although a vaccine that’s 90.7% effective in preventing the illness was authorized for younger kids in late October, these figures apparently aren’t convincing enough to persuade many parents to vaccinate their children.

Understanding Breakthrough Infections Following mRNA SARS-CoV-2 Vaccination

04 Nov 2021

The current surge in infections with the SARS-CoV-2 Delta variant has made it clear to health care workers and the public alike that fully vaccinated people remain at risk for SARS-CoV-2 infections. It is also apparent that breakthrough infections in fully vaccinated people can sometimes be serious. As of October 21, 2021, for example, 35% of the 519 patients hospitalized with COVID-19 in Massachusetts had been fully vaccinated.1 Furthermore, multiple reports have documented that if fully vaccinated individuals do become infected, their viral loads may be as high as the levels seen in unvaccinated individuals.

Coverage and Estimated Effectiveness of mRNA COVID-19 Vaccines Among US Veterans

06 Oct 2021

Question What was the COVID-19 vaccination coverage and estimated mRNA COVID-19 vaccine effectiveness (VE) among US veterans in the first 3 months following vaccine rollout? Findings In this case-control study including 6 647 733 veterans, 23% of veterans received at least 1 COVID-19 vaccination during the first 3 months of vaccine rollout. VE against infection was estimated to be 95% for full vaccination; estimated VE against COVID-19-related hospitalization was 91%, and there were no COVID-19–related deaths among fully vaccinated veterans. Meaning These findings suggest that early vaccination rollout for veterans was efficient, and estimated VE was high for this diverse US population.

Protection of BNT162b2 Vaccine Booster against Covid-19 in Israel

15 Sep 2021

Background: On July 30, 2021, the administration of a third (booster) dose of the BNT162b2 messenger RNA vaccine (Pfizer-BioNTech) was approved in Israel for persons who were 60 years of age or older and who had received a second dose of vaccine at least 5 months earlier. Data are needed regarding the effect of the booster dose on the rate of confirmed coronavirus 2019 disease (Covid-19) and the rate of severe illness. Conclusions: In this study involving participants who were 60 years of age or older and had received two doses of the BNT162b2 vaccine at least 5 months earlier, we found that the rates of confirmed Covid-19 and severe illness were substantially lower among those who received a booster (third) dose of the BNT162b2 vaccine.

Surveillance for Adverse Events After COVID-19 mRNA Vaccination

03 Sep 2021

Question Are mRNA COVID-19 vaccines associated with increased risk for serious health outcomes during days 1 to 21 after vaccination? Findings In this interim analysis of surveillance data from 6.2 million persons who received 11.8 million doses of an mRNA vaccine, event rates for 23 serious health outcomes were not significantly higher for individuals 1 to 21 days after vaccination compared with similar individuals at 22 to 42 days after vaccination.