
COVID-19 infections and deaths vary by the 4 seasons annually and cycle by the day of the week.

COVID-19 infections and deaths vary by the 4 seasons annually and cycle by the day of the week.

Daily fluctuations in new confirmed cases of coronavirus disease 2019 (COVID-19) reveal a weekly cycle, with increasing risk of infection through the workweek, but an overall negative trend.

Meta-analyses of percutaneous coronary interventions in stable coronary artery disease are updated to include 2 recent large randomized controlled trials.


June 1st 2007

August 1st 2008