As Americans get vaccinated, fewer are getting tested for COVID-19. Doctors say that could be a big problem. Ken Alltucker, USA TODAY Replay Video UP NEXT Public heath experts have been critical of states such as Texas and Mississippi that tossed aside mask mandates this week at a critical juncture in the nation's pandemic. But they also warn of another threat to hard-fought gains in recent weeks – the number of Americans getting tested for coronavirus has dropped significantly since January. While the testing slowdown may be the result of fewer infections, it also might signal too many Americans are growing complacent as the second year of COVID-19 marches on and millions get vaccinated every week.