For how we live.
A meta-analysis of more than 155,000 children finds mortality is elevated even at oxygen saturations of 90–94%, above the threshold at which WHO advises hospital oxygen.
Two pragmatic randomised trials and a Medicare nursing home cohort landed in the same week. Together they show real protection against hospitalisation and a durability question nobody has answered.
Two February papers put respiratory virus activity into the models. One finds pollution effects amplified at peak influenza; the other finds them attenuated when rhinovirus is high.
A Lancet study across 547,000 adults and 925 infectious diseases finds obesity raises the risk of severe infection across almost every pathogen type. The global estimate rests on modelling, not on the cohorts themselves.
Nearly a million conscripts followed for three decades: obesity carried a 3.1-fold hazard for sepsis, and high cardiorespiratory fitness was associated with a 42% lower risk of dying from bacterial infection.
Deaths during combined heat and ozone days in Hong Kong, preterm births projected across Chinese cities to 2100, and a seasonal flip in Japan's ambulance demand from winter to summer.