Scientists probe Japan's remarkable COVID success in hunt for new vaccine to protect some of the most vulnerable

Japan's notable coronavirus pandemic resilience has generated scores of possible explanations, from the country's preference for going shoeless indoors, to the purportedly low-aerosol-generating nature of Japan's quiet conversation, to its citizens' beneficial gut bacteria. Even irreligiousness — said to have spared the Japanese from exposure to crowded houses of worship — has been touted as a virtue in the age of COVID-19. Despite having the world's oldest population, with almost one in three residents 65 or older, Japan has had fewer COVID fatalities per capita than almost any other developed nation.