RSV vaccine 75% effective against hospitalization in older adults, CDC study estimates The respiratory syncytial virus (RSV) vaccine for older adults was 75% effective against hospitalization in its first season of use, adding to the findings of prelicensure trials, according to a test-negative, case-control analysis published today in JAMA. CIDRAP

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An estimated 60,000 to 160,000 RSV hospital admissions occur each year among US adults aged 65 years and older.

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Study puts understanding of long COVID and vaccination into question A new study from researchers at the Mayo Clinic suggests that being vaccinated against COVID-19 does little to prevent long COVID. CIDRAP

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Study: COVID increased gender mortality gaps in wealthy countries A new study in the International Journal of Infectious Diseases analyzed World Health Organization (WHO) data and found COVID-19 increased existing gender mortality gaps in high-income countries until 2021, when COVID-19 vaccines were rolled out. CIDRAP

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After age 45, men die at higher rates in nearly all places and at all ages, the authors wrote. While previous studies have shown men die at higher rates than women from COVID-19, the excess mortality gap has not yet been fully described based on the economic status of countries.

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COVID Vaccines Reduce Long COVID Risk, New Study Shows A study published in The New England Journal of Medicine found that COVID-19 vaccinations played a key role in the drop in Long COVID cases. Yale Medicine

The good news is, the risk of developing Long COVID has dropped significantly since the start of the pandemic—and, according to a new study, we have COVID-19 vaccines to thank for much of this decline. The bad news is, the risk of developing this post-acute infection syndrome remains substantial.