Scientists at the U.S. Centers for Disease Control and Prevention are issuing what some are saying is “out-of-touch” and “unrealistic” guidance for schools amid the COVID-19 pandemic, CNN reported.

On Jan. 6, the CDC advised that schools “cancel or hold high-risk sports and extra-curricular activities virtually” any time a community has what is considered a “high” COVID-19 transmission rate. Such activities include “those in which increased exhalation occurs, such as activities that involve singing, shouting, band, or exercise, especially when conducted indoors.”