** Shares of drugmaker Invivyd IVVD.O rise 1.4% to $2.92 premarket
** Co says it has started late-stage clinical trial to test its experimental COVID-19 antibody, VYD2311, as a preventive treatment for the disease
** Study will enroll 1,770 adults and teens; compare single vs monthly shots to placebo, says co
** IVVD says the goal is to offer vaccine alternative for high-risk people seeking protection
** Top-line results expected by mid-2026 - IVVD
** Up to last close, stock up ~133% YTD
(Reporting by Sahil Pandey in Bengaluru)
((Sahil.Pandey@thomsonreuters.com))
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