[Porsche-O-Phile]

There are studies coming out that suggest that many more people have been exposed to this than originally thought. If so, many people may already have full or partial immunity.

As a counterpoint there are also some studies suggesting that something like 30% of those infected and recovered do not produce antibodies sufficient to ward off a recurrence.

In other words we don’t really know, but I’m betting the first point is probably more true. There are probably a lot more people who have caught this and been asymptomatic than we think. Only antibody testing will confirm that and it’s still probably months away from deployment and having statistically relevant sample sizes.