The Centers for Disease Control and Prevention sent out a tweet on Sunday, which further complicated the practice of wearing masks to help stop the spread of COVID-19. The tweet said, “All masks help prevent the spread of #COVID19 when worn consistently and correctly. Choose a mask with the best fit, protection, and comfort for you.”

The problem is this tweet came about a week after the CDC made a major update on its mask-wearing policy and suggested cloth masks don’t work nearly as well as previously advertised. The CDC recommended N95 and KN95 masks instead.