COVID-19 lockdowns blocked flu in some places but fall looms

JOHANNESBURG (AP) — Winter is ending in the Southern Hemisphere and country after country -- South Africa, Australia, Argentina -- had a surprise: Their steps against COVID-19 also apparently blocked the flu.

But there’s no guarantee the Northern Hemisphere will avoid twin epidemics as its own flu season looms while the coronavirus still rages.

“This could be one of the worst seasons we’ve had from a public health perspective with COVID and flu coming together. But it also could be one of the best flu seasons we’ve had,” Dr. Robert Redfield, director of the U.S. Centers for Disease Control and Prevention, told The Associated Press.

U.S. health officials are pushing Americans to get vaccinated against the flu in record numbers this fall, so hospitals aren’t overwhelmed with a dueling “twindemic.”

It’s also becoming clear that wearing masks, avoiding crowds and keeping your distance are protections that are “not specific for COVID. They’re going to work for any respiratory virus,” Redfield said.

The evidence: Ordinarily, South Africa sees widespread influenza during the Southern Hemisphere’s winter months of May through August. This year, testing tracked by the country’s National Institute of Communicable Diseases is finding almost none — something unprecedented.

School closures, limited public gatherings and calls to wear masks and wash hands have “knocked down the flu,” said Dr. Cheryl Cohen, head of the institute’s respiratory program.

That not only meant lives saved from flu’s annual toll, but it “freed up our hospitals’ capacity to treat COVID-19 patients,” Cohen added.

In Australia, the national health department reported just 36 laboratory-confirmed flu-associated deaths from January to mid-August, compared to more than 480 during the same period last year.

“The most likely and the biggest contributor is social distancing,” said Dr. Robert Booy, an infectious diseases expert at the University of Sydney. ...