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Severe COVID-19 May Cause Long-Term Immune System Changes


30 Nov 2023

What you need to know In a small study supported by the National Institute of Allergy and Infectious Diseases (NIAID), severe cases of COVID-19 were shown to cause long-lasting changes to the immune system. Researchers found that severe cases of COVID-19 can change which genes are turned on or off in certain stem cells. The study focused on stem cells that produce white blood cells, a part of the immune system. The stem cells of people who recovered from severe COVID-19 produced more white blood cells — which then produced more inflammatory signals — than the cells of healthy counterparts.


Severe COVID-19 May Cause Long-Term Immune System Changes


30 Nov 2023

What you need to know: In a small study supported by the National Institute of Allergy and Infectious Diseases (NIAID), severe cases of COVID-19 were shown to cause long-lasting changes to the immune system. Researchers found that severe cases of COVID-19 can change which genes are turned on or off in certain stem cells. The study focused on stem cells that produce white blood cells, a part of the immune system. The stem cells of people who recovered from severe COVID-19 produced more white blood cells — which then produced more inflammatory signals — than the cells of healthy counterparts.


SARS-CoV-2 infects coronary arteries, increases plaque inflammation


28 Sep 2023

NIH-funded research sheds light on the link between COVID-19 infection and increased risk of cardiovascular disease and stroke SARS-CoV-2, the virus that causes COVID-19, can directly infect the arteries of the heart and cause the fatty plaque inside arteries to become highly inflamed, increasing the risk of heart attack and stroke, according to a study funded by the National Institutes of Health. The findingsexternal link, published in the journal Nature Cardiovascular Research, may help explain why certain people who get COVID-19 have a greater chance of developing cardiovascular disease, or if they already have it, generate more heart-related complications.


Cold virus may set the stage for Long COVID


20 Sep 2023

At a Glance Prior infection with a common cold coronavirus may predispose some people to develop Long COVID. The findings identify a potential marker that could help identify people at high risk of developing Long COVID.


Genetic variant associated with absence of COVID-19 symptoms


09 Aug 2023

At least 20% of people infected with SARS-CoV-2, the virus that causes COVID-19, never showed symptoms. These asymptomatic infections could provide clues to how the virus can be quickly cleared from the body. Genetic factors may be involved. However, most studies of genetics and COVID-19 outcomes to date have focused on severe disease.




Articles


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.




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