Some researchers have described the period running up to someone developing ME/CFS and long COVID, as a “prodromal” phase. In ...

Questions remain over where COVID came from and how long it spread undetected. Five years ago, the World Health Organization declared the COVID-19 outbreak to be a pandemic, leading to stay at ...

SARS-CoV-2 has been evolving the ability to evade the immune system about twice as fast as the fastest-evolving flu virus. It ...