Dr. William Henrich, president, UT Health San Antonio, offers readers of the Houston Chronicle his warning that traveling (in planes, buses, trains) when in a closed setting, where breathing is re-circulated, is risky.
Newsroom
Dr. William Henrich, president, UT Health San Antonio, offers readers of the Houston Chronicle his warning that traveling (in planes, buses, trains) when in a closed setting, where breathing is re-circulated, is risky.