DETROIT – On Monday, the White House COVID-19 Response Team urged Americans not to let their guard down and continue following recommendations to slow the spread of the virus. Those concerns were heightened by worries about the new variants. Even with ongoing efforts to increase vaccine production the demand far outweighs the supply. Scientific models predict the more contagious United Kingdom variant will become the dominant virus in the United States by the end of March. “We anticipate that we are probably going to be sequencing up to three to four more than we are already sequencing.