Biden Warns Unvaccinated They Are Putting Communities at Risk Voice of America 07 Jul 2021, 09:05 GMT+10 As 10 U.S. states see a spike in coronavirus cases, President Joe Biden warned on Tuesday that "millions of Americans are still unvaccinated and unprotected and, because of that, their communities are at risk." In his latest broadcast appeal for people to get vaccinated against COVID-19, the president said the delta variant of the virus, which is more transmissible and potentially more dangerous, is already responsible for half of the cases in many parts of the country. The states of Kansas and Missouri, in particular, are reporting double-digit percentage surges in infections due to the delta variant.