Evolving science reason for inconsistent messaging on COVID-19: Tam
OTTAWA — Canada’s chief public health officer says messages on how to keep safe during the COVID-19 pandemic might seem inconsistent, but that’s because the epidemiology is different across the country and the science on the virus has evolved.
“We have been criticized as public health professionals for changing our advice over time,” Dr. Theresa Tam said Thursday.
“We have been doing so because the science is evolving.”
Speaking at a journalism conference at Carleton University in Ottawa, Tam said public health officials had to change their advice regarding wearing non-medical masks when epidemiologists came to understand that asymptomatic people can transmit the virus that causes COVID-19.

