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Welcome to Prognosis. I'm Laura Carlson. It's day 161 since coronavirus was declared a global pandemic.

Today's main story, doctors are worried that the coming flu season will make fighting the pandemic

even harder. But countries in the Southern Hemisphere have already coped

with the influenza COVID double threat and may have lessons for the U.S. But first,

here's what happened in virus news today.

New York City's positive test rate for COVID-19 has fallen to its lowest level since the pandemic began.

The city's mayor, Bill de Blasio, said at a news briefing that after more than two months of experiencing positive test rates of less than 3%, the city recorded a 0.24% test rate this week.

De Blasio called New York City, once the global epicenter of the outbreak, quote,

one of the safest places in the country when it comes to the coronavirus, end quote.

But he also said the city still has a long way to go.

Hong Kong reported the lowest number of new coronavirus infections since a recent surge

that turned into its worst outbreak yet. The numbers reinforced hopes that stringent

citywide containment measures can be eased.

The city has also seen a decline in the share of cases with unknown origins over the past week,

signaling that untraceable infections are dwindling.

But in Greece, distancing rules have been tightened after the country reported its highest number of cases yet.

People in two tourist regions will have to wear masks both indoors and outdoors, according to the government.

The authorities also suspended all events

...