Covid-19 has spread around the world, sending millions of people into lockdown as health services struggle to cope. From symptoms and long Covid to vaccines and treatments, the Guardian’s health editor, Sarah Boseley, explains what we now know about the…

Covid-19 vs Influenza Explained: With the flu (influenza) season starting, I thought it would be fun to make a video how I see the differences between the two. Can you really tell the difference between the two? Is the dreaded…