Where Did Omicron Come From? Maybe Its First Host Was Mice
[ad_1] It’s one of the perplexing mysteries of the Covid pandemic: Where did Omicron emerge from, almost one year ago? The fast-moving, extremely contagious variant arrived just after Thanksgiving 2021,…
Monkeypox Originated in Animals. Could It Spill Back Into Them?
[ad_1] Two months into the international monkeypox epidemic, which so far has caused almost 6,000 infections in the United States and more than 18,000 cases worldwide, it may be old…