Winter waves . . . and other stories

A winter wave of covid-19Waning immunity and the many factors that help respiratory viruses thrive in cooler months are likely to drive covid-19 infections higher in the northern hemisphere this winter. It’s also clear that omicron and other variants of SARS-CoV-2 are continuing to evolve and we may soon see a new generation of immunity dodging viruses. The good news is that, so far at least, both old and new covid-19 vaccines remain effective in preventing severe disease (https://www.nature.com/articles/d41586-022-03157-x).Activity after retirementParticipants in the Finnish Retirement and Aging study wore accelerometers to measure their physical activity before and after they retired. Not surprisingly, time spent in active behaviours tended to decrease after retirement, especially among manual workers. Moderate and vigorous physical activity decreased more than light activity (Int J Behav Nutr Physical Act doi:10.1186/s12966-022-01364-3).Treatment of asymptomatic carotid stenosisWhat’s the best treatment for asymptomatic people with severe stenosis of common or internal…
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