As vector-borne diseases begin to spread more widely around the world, we look at why, what the effects are, and what can be done.

Also on the program, a new study has examined the origins of the Covid-19 pandemic, what did they find, and how is this different from previous papers? And can space flight age you? A new study tries to find out.

Presenter: Claudia Hammond Producer: Margaret Sessa-Hawkins and Katie Tomsett