Patrick Evans Ultra Tour

BBC Health

• Coronavirus: 'The masks you throw away could end up killing a whale'
  As the world battles the Covid-19 pandemic, more and more protective equipment is ending up in the sea.
• Can you get coronavirus twice?
  What you need to know about how the immune system works.
• ‘They paused my chemo because of Covid’
  Thousands of cancer patients have had treatment halted or delayed because of Covid-19.