A Canadian survey tied repeat COVID-19 infections to 76% higher odds of a new diagnosis. Here is what it shows and what it cannot prove.

During the COVID-19 pandemic, governments around the world faced the same basic challenge: measuring a fast-moving public health crisis and communicating its severity to citizens.

Hundreds of millions of people have long-term conditions as a result of an infection. Researchers are working out how to help them.

It is believed the mosquitoes arrived at Germany's busiest airport on a plane, according to German public health officials.

The iconic Sydney Marathon hosted more than 40 current and former IDF personnel on the weekend. In the same week,...

COVID-19 Cases Surge in China, South Korea Chinas 522,000 cases, South Koreas 9.1% detection rate signal COVID-19 surge

The Bulldogs overcame a five-player COVID outbreak and an overnight hospital stay for Jacob Preston to keep their season alive with a commanding 44-14 victory over St George Illawarra.

Some insights from a recent retraction

Three mass bird mortality events believed to be linked to the H5N1 avian flu strain have been recorded on islands off SA, the state's premier has told parliament.

A reminder of how terrible these diseases used to be