The current pandemic has impacted lab animals, with US research labs culling thousands of mice. Germany has coped somewhat better, but the situation has once more highlighted the contentious practice of animal testing.
Knowing the origin of omicron can help us understand how long this pandemic will last and where other variants lurk. Omicron is in at least 77 countries.
The two hippos at Antwerp Zoo tested positive for the coronavirus after a vet noticed their noses were "expelling snot." The huge animals, who are mother and daughter, are not in great peril.
Samples from various animals at the zoo were tested after several lions fell ill. The two infected hyenas are believed to be the first in the world to contract COVID-19.
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