As it happened: US reported coronavirus deaths pass 65,000 - BBC News
The US has the highest toll in the world and about a third of the 3.3m total cases, a tally shows.
Testing for antibodies has already started around the world, but it is not yet known whether having the virus guarantees immunity. Image caption: Testing for antibodies has already started around the world, but it is not yet known whether having the virus guarantees immunity.

During the UK government's daily news briefing earlier, a member of the public asked about what we know when it comes to immunity from the virus.

At the moment, the World Health Organization (WHO) says there isn’t yet good evidence that suggests having the virus once protects you from getting it again.

When the WHO say "no good evidence", they mean this hasn’t been properly studied yet.

We’d expect that having the illness would grant you some immunity, at least for a period of time. But the question is how much and for how long? Will a mild case now protect you if you’re exposed to a bigger dose of the virus later?

Lots of people are in the process of trying to answer these questions.

Countries including South Korea, Germany, Italy and the UK are beginning to test samples of their populations for antibodies.

This could provide more information about whether (and for how long) the disease gives immunity to those who have recovered.