** U.S.-listed shares of Switzerland-based biotechnology co
EARS.O more than double to $3.45 - set for a near two-year
high
** Stock is biggest pct gainer across U.S. exchanges
** Co says daily treatment with its experimental drug-free
nasal spray, AM-301, showed effective protection against the
SARS-CoV-2 viral infection in in-vitro study urn:newsml:reuters.com:*:nGNX2SBkjJ
** AM-301 was tested for its capability to prevent or
mitigate infection of nasal epithelial cells, which are the
first barrier against inhaled pathogens and allergens
** Co plans to submit regulatory applications for AM-301 in
2021
** Up to Monday's close, stock down 31.5% YTD
(Reporting by Amruta Khandekar)
((Amruta.Khandekar@thomsonreuters.com;))