Trump praises son's Hannity interview on Russia emails

As the coronavirus continues to spread throughout the U.S., Axios is answering readers' questions about the pandemic — how it spreads, who's at risk, and what you can do to stay safe.

What's new: This week, we answer five questions on smokers' vulnerability, food safety, visiting older parents, hair cut needs, and rural vs. urban impact.

Researchers are racing to develop tests that detect whether someone may have developed immunity to the coronavirus, which could help society return to normal faster.

Why it matters: These tests could help people know if they are able to go back to work, as well as aid researchers in tracking the scale and death rate of the disease — key data for current and future pandemic policies.

The countries that have most successfully fended off the novel coronavirus have mainly done it with a combination of new technology and old-school principles.

Why it matters: There's a lot the U.S. can learn from the way other countries have handled this global pandemic — although we may not be able to apply those lessons as quickly as we'd like.