Enlarge / Influenza virus. Image produced from an image taken with transmission electron microscopy. Viral diameter ranges from around 80 to 120 nm.Getty | BSIP
The World Health Organization on Friday recommended ditching a common component of seasonal influenza vaccines that protects against a particular strain of the virus—because that strain appears to no longer exist.
Influenza viruses in the B/Yamagata lineage have not been detected since March 2020, when the pandemic coronavirus, SARS-CoV-2, was mushrooming around the world. SARS-CoV-2’s explosive viral transmission and the health restrictions that followed drastically disrupted the spread and cycles of other infectious diseases, with
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