Republican senator Rand Paul’s YouTube Account was suspended on Tuesday for seven days over a video claiming that masks are ineffective against Covid-19. It is the latest move against a prominent public figure who has spread disinformation about ways to protect against the virus or about the vaccines developed to fight it. Many public health experts have advised using masks, and the Centers for Disease Control and Prevention (CDC) first recommended the public wear cloth masks in April 2020. Paul cast doubt on the effectiveness of masks, saying, “Most of the masks you get over the counter don’t work. They don’t prevent infection,” before adding, “Trying to shape human behavior isn’t the same as following the actual science, which tells us that cloth masks don’t work.” How Effective are the masks against Covid-19?