Lansing, MI — Michigan is lifting an outdoor mask requirement except in gatherings of at least 100 people and in organized contact sports. It also says teen athletes no longer must undergo regular COVID-19 testing if they are fully vaccinated. The revised pandemic order takes effect Thursday. Vaccinated people are not required to be masked at indoor residential gatherings. More than half of Michigan residents ages 16 and older have gotten at least one shot. The order, which ends May 31 unless extended, also allows for festivals, fairs and golf tournaments to exceed a 1,000-person limit under certain conditions.