The World Health Organization is recommending healthy people, including those who don't exhibit COVID-19 symptoms, only wear masks when taking care of someone infected with the contagion, a sharp contrast from the advice given by American public health officials who recommend everyone wear a mask in public. If you do not have any [respiratory] symptoms such as fever, cough or runny nose, you do not need to wear a mask," Dr. April Baller, a public health specialist for the WHO, says. "Masks should only be used by health care workers, caretakers or by people who are sick with symptoms of fever and cough." The recommendation differs from the Centers for Disease Control and Prevention (CDC), which urges individuals to wear a mask or face covering in public settings, regardless of infection, to limit the spread of the virus. "We now know from recent studies that a significant portion of individuals with coronavirus lack symptoms ('asymptomatic') and that even those who eventually develop symptoms ('pre-symptomatic') can transmit the virus to others before showing symptoms," the CDC mask guidance says. "In light of this new evidence, CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain." Baller noted that masks can give people a "false feeling of protection" and noted that sick individuals should wear one to prevent transmitting the virus to others.