Also: CDC offers infection estimates on COVID-19, study finds malaria drug increases risk of death in patients
(CBC News, 5/21/20)
Calgary historian Harry Sanders discusses the lessons from the city’s 1918 outbreak of H1N1, also called the Spanish flu. The flu was brought to Calgary by soldiers returning home from WWI. When they arrived, the sick soldiers were quarantined, but the flu spread among the population anyway. Officials instituted lockdowns and mandatory mask wearing, fining those who didn’t comply.
(Arman Azad, CNN, 5/2/20)
The CDC has issued new estimates for COVID-19 transmission and mortality, though they stress that their figures may change as new data is gathered. For now, they estimate that 35% of people infected with SARS-CoV-2 are asymptomatic, and that 40% of infections come from people who are not yet displaying symptoms.
(Ariana Eunjung Cha and Laurie McGinley, The Washington Post, 5/22/20)
A recent study published in Lancet claims that COVID-19 patients treated with hydroxychloroquine or with chloroquine had a higher mortality risk than other patients after developing arrhythmia. The study included 96,000 patients globally, and excluded patients on respirators and those who were given the antiviral drug remdesivir. Patients given hydroxychloroquine showed 34% increase in mortality risk, and those given hydroxychloroquine plus an antibiotic showed a 45% increased risk.
—Stories compiled by Senior Scientific Writer Mary Parker