The head of the World Health Organization has ruled out a herd immunity response to the pandemic. Herd immunity occurs when a large portion of a community becomes immune to disease through vaccinations or the mass spread of disease. Some have argued that coronavirus...

Being obese doubles the risk of hospital treatment from Covid-19 and increases the risk of dying by nearly 50%, a global analysis suggests. Obesity makes other diseases such as diabetes and high blood pressure more likely, the US researchers say. Along with a weakened...

Two cases of coronavirus infection in patients that had previously had the virus have been reported in Europe. The news follows the first confirmation of a case of COVID-19 reinfection in a man in Hong Kong, who tested positive twice for the disease. According to the...