Guards in biohazard suits, ready to stop anyone from leaving. Athletes giving interviews from behind plastic walls, speaking through microphones. All-day armpit thermometers, with tiny transmitters to sound the alarm should someone develop a fever.

With the Winter Olympics in Beijing just six months away, the Chinese authorities are planning elaborate precautions against COVID-19. The measures are expected to go far beyond those taken at the Tokyo Games, which ended Sunday with more than 400 infections reported.

China has made clear that containing the virus is its top priority. On July 30, as case numbers were climbing in Tokyo, Beijing organizers announced plans to redesign their 39 Olympic venues. Workers are now dividing passageways lengthwise and installing new toilets and other facilities.