Ventilation is very important, but they are no substitute for vaccination or masks. Vaccines greatly reduce hospitalization and mortality. Masks decrease the spread of respiratory secretions which SARS-CoV-2 can travel on and infect others.

@OU_President @wxjay All that’s needed to end the pandemic is ventilation of indoor spaces. Neither masks nor vaccines required. CO2 is an excellent proxy for accumulation of exhalation. Meters recommended for classrooms & lecture halls. Open up & ventilate.