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Tuesday, Nov 26th

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Even a mild case of COVID-19 can cause brain changes. It's too soon to know if the damage lasts.

brain changes caused by Covid-19

A new study provides the most conclusive evidence yet that COVID-19 can damage the brain, even in people who weren't severely ill.

The study, published Monday in Nature, used before-and-after brain images of 785 British people, ages 51 to 81, to look for any changes. About half the participants contracted COVID-19 between the scans – mostly when the alpha variant was circulating – which left many people at least temporarily without a sense of smell.

Analysis of the "before" and "after" images from the UK Biobank showed that people infected with COVID-19 had a greater reduction in their brain volumes overall and performed worse on cognitive tests than those who had not been infected.

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CDC updates guidance for intervals between COVID-19 vaccine doses

CDC changes interval between vaccinesThe Centers for Disease Control and Prevention (CDC) on Tuesday issued new COVID-19 mRNA vaccine guidance, expanding the recommended time between the initial two vaccine doses to eight weeks for some people over the age of 12, particularly young men.

The prior recommended interval between initial doses was three weeks for the Pfizer-BioNTech vaccine and four weeks for the Moderna vaccine. This timeline is still recommended by the CDC for individuals who are immunocompromised, over 65 years old or in need of rapid protection against the coronavirus.

According to the CDC, however, leaving more time between the first two doses of mRNA COVID-19 vaccines may reduce the risk for severe side effects such as myocarditis, or inflammation of the heart wall.

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Amid backlash from chronic pain sufferers, CDC drops hard thresholds from opioid guidance

CDC opioid limits changedNew guidance on prescribing opioids unveiled Thursday by the Centers for Disease Control and Prevention avoids the strict limits found in a 2016 version that accelerated a nationwide drop in pain pill prescriptions but led to backlash from chronic pain patients.

The 229-page document advises doctors to limit new opioid prescriptions and discuss alternative therapies with patients. But the new guidance largely avoids figures on dosage and length of prescription and warns against abruptly or rapidly discontinuing pain pills for some chronic pain patients.

"We've built in flexibility so that there's not a one-size-fits-all approach," said Christopher Jones, acting director of the CDC's National Center for Injury Prevention and Control.

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FDA approves first injectable drug to prevent HIV

FDA approves HIV prevention drugA new injectable treatment for HIV pre-exposure prevention, or PrEP, has been approved by the Federal Drug Administration.

The drug, Apretude, is approved for at-risk adults and adolescents who weigh at least 77 pounds to reduce the risk of sexually acquired HIV, the FDA announced Monday.

“Today’s approval adds an important tool in the effort to end the HIV epidemic by providing the first option to prevent HIV that does not involve taking a daily pill,” Debra Birnkrant, director of the Division of Antivirals in the FDA’s Center for Drug Evaluation and Research, said in the announcement.

After the initial two injections, Apretude is administered one month apart, then every two months after that. The hope is that high-risk individuals, like men who have sex with men, will have better adherence to taking the PrEP injectable option every two months versus taking a pill everyday.

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Harvard announces January move to remote learning, work as COVID-19 case numbers rise

Harvard goes remoteHarvard University announced on Saturday that it would be transitioning to remote learning for several weeks in January amid an increase of new cases in the area and around the country.

In a letter to the school’s community, Harvard officials said that for the first three weeks of January, “we will take steps to reduce density on campus by moving much of our learning and work remotely."

The letter noted that students who had received approval from their specific school or previous authorization would be the only students allowed to remain on or return to campus during the three-week period.

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Eight heart inflammation cases among young kids who got COVID-19 shot - U.S. CDC

Eight heart inflammation casesThe U.S. Centers for Disease Control and Prevention said on Thursday it had received reports of eight cases of myocarditis, a type of heart inflammation, in children aged 5-11 years who received Pfizer (PFE.N) and BioNTech's COVID-19 vaccine.

The CDC had previously said that reporting rates of myocarditis for boys aged 16 to 17 could be more than 69 cases per million second doses administered and around 40 cases per million second doses in boys aged 12-15 years old.

The CDC did not say whether it believes there is a link between the myocarditis cases and the vaccine, or disclose the rate of myocarditis in the age group without vaccination.

The agency said there had been over 7 million vaccine doses in the 5-11 age group at the time it examined the data, with 5.1 million first doses and 2 million second doses. The cases had a mild clinical course, the CDC said.

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U.S. CDC advisers to weigh limits on J&J vaccine due to blood clot issues

CDC advisers to weigh limits on J&J vaccines- A U.S. Centers for Disease Control and Prevention advisory panel will meet on Thursday to consider possible limits on the use of the Johnson & Johnson (JNJ.N) COVID-19 vaccine because of continued blood clot issues, the Washington Post reported on Wednesday.

The CDC's Advisory Committee on Immunization Practices will be presented new data that appears to show the rate of clots in people who received the Johnson & Johnson vaccine has increased since April, the Post reported, citing clinicians familiar with the agenda.

Use of the vaccine in the United States was paused for 10 days in April to investigate extremely rare but potentially deadly clots, mostly in young and middle-aged women. r

There have been about nine deaths related to the issue, the Post said, citing an unnamed federal official.

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