By Jennifer Rigby and Natalie Grover LONDON – Health authorities around the world are investigating a mysterious increase in severe cases of hepatitis – inflammation of the liver – in …
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explainer-scientists
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By Julie Steenhuysen CHICAGO – The highly transmissible Omicron variant of the SARS-CoV-2 virus – the most common form of which is known as BA.1 – now accounts for nearly …