There have been a few accounts of patients who have tested positive, then negative, then positive again for COVID-19.
So, if you have ever tested positive, there is a chance you could contract the virus again. And you could infect other people. You should still take the necessary precautions.
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A new review from the Australian Academy of Health and Medical Sciences says managing the pandemic into 2021 will mean persisting with the measures that have made Australia's response successful so far.
People wearing masks walk in front of Pfizer’s headquarters in New York City. Pfizer and BioNtech are on track with a vaccine that is 90 per cent effective, say preliminary results, but they are not the only ones in the race.
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Canada has set aside a total of 414 million doses of different types of vaccine. Some exploit known mechanisms, others are based on previously untested approaches.
Dr. Jonas Salk, left, developed the first effective polio vaccine.
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A tragic error showed how complicated it can be to distribute vaccines on a mass scale.