Coronavirus may be more severe in colder months than warmer ones, and dry indoor air may encourage its spread, new research suggests.
Severe Covid-19 outcomes decreased as the pandemic progressed from winter to the warmer months, analysis indicates. Experts warn that their findings paint a grim picture for the colder weather, when it is thought the disease may re-emerge.
Researchers analysed data from 6,914 patients admitted to hospital with Covid-19 in Croatia, Spain, Italy, Finland, Poland, Germany, the UK and China.
They mapped this against local temperature and estimated indoor humidity and found that severe outcomes - being taken to hospital, admittance to ICU or the need for ventilation - dropped in most European countries over the