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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.

Variants of SARS-CoV-2

13 Aug 2021

When a virus develops a new mutation, it is called a variant of the original virus. As viruses spread, they constantly change through mutations to their genetic code. Most mutations in the SARS-CoV-2 genome do not affect the functioning of the virus. However, mutations in the spike protein of SARS-CoV-2, which binds to receptors on cells lining the inside of the human nose, may make the virus easier to spread or affect how well vaccines protect people. Other mutations may lead to SARS-CoV-2 being less responsive to treatments for COVID-19.

Randomized Trial of a Third Dose of mRNA-1273 Vaccine in Transplant Recipients

11 Aug 2021

In organ-transplant recipients, the standard two-dose vaccination strategy for coronavirus disease 2019 (Covid-19) has suboptimal immunogenicity.1 Both patients and health care providers have questioned whether a third-dose booster in transplant recipients would be safe and enhance immune response.2 We performed a double-blind, randomized, controlled trial of a third dose of mRNA-1273 vaccine (Moderna) as compared with placebo (the protocol is available with the full text of this letter at NEJM.org; ClinicalTrials.gov number, NCT04885907. opens in new tab).

Long-term Symptoms After SARS-CoV-2 Infection in Children and Adolescents

15 Jul 2021

Children can experience SARS-CoV-2 postviral syndromes, but it is unclear to what extent these individuals are affected by long COVID. Evidence is predominantly limited to select populations without control groups,1-4 which does not allow estimating the overall prevalence and burden in a general pediatric population. We compared symptoms compatible with long COVID in children and adolescents (hereafter “children”) reported within 6 months after SARS-CoV-2 serologic testing.

Study Suggests Lasting Immunity After COVID-19, With a Big Boost From Vaccination

14 Jul 2021

After an infection with SARS-CoV-2, most people—even those with mild infections—appear to have some protection against the virus for at least a year, a recent follow-up study of recovered patients published in Nature suggests. What’s more, this and other research demonstrates that vaccinating these individuals substantially enhances their immune response and confers strong resistance against variants of concern, including the B.1.617.2 (delta) variant.

Return to Play After COVID-19 Infection in Children

28 Jun 2021

As the pandemic continues, children may experience long-term effects from COVID-19 infections. Because children may become “long haulers” or develop multisystem inflammatory syndrome in children (MIS-C), close monitoring after a COVID-19 diagnosis is important. In addition, children who are athletes require a separate return-to-play evaluation before they return to competitive sports or physical activities.