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Regeneron Pharmaceuticals (REGN) — Regeneron shares fell more than 1% in the premarket after the company said its Covid-19 antibody cocktail and similar drugs could be less effective against the omicron Covid variant. The drugmaker said mutations in the variant suggest «there may be reduced neutralization activity of both vaccine-induced and monoclonal antibody conveyed immunity.»
Moderna (MRNA), Pfizer (PFE) — Shares
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