Hang Seng pharmaceuticals sector slumps more than 6%, Kintor Pharma falls 20%, Fosun Pharma down 16% as investors cheer Merck's antiviral pill.
  $Pharmaceuticals (BK1067)$ 
  $FOSUN INTL (00656.HK)$ 
  $KINTOR PHARMA-B (09939.HK)$