How Mask Guidelines Have Changed

Officials offered mixed messages about masks in the early days of the coronavirus pandemic before embracing them as a simple but effective tool for slowing the spread of Covid-19.
Source: NYT - Category: American Health Authors: Tags: States (US) Masks Coronavirus (2019-nCoV) Hygiene and Cleanliness Vaccination and Immunization Centers for Disease Control and Prevention World Health Organization Biden, Joseph R Jr Trump, Donald J Coronavirus Risks and Safety Concerns Source Type: news