U.S. doctor warns on recent uptick in virus cases, says medical system may be stressed if people aren't careful

“The second wave has begun,” said William Schaffner of the Vanderbilt University School of Medicine. Even so, he said he “cannot imagine” a second shutdown following the economic, social and cultural impact of the first one. Other countries, however, have not shied away from reimposing measures. Last week, Beijing reportedly banned tourism and locked down 11 neighborhoods in response to infections related to a wholesale market.