$MRK Merck announced the US launch of its Herceptin biosimilar, Ontruzant, at a WAC representing a 15% discount to current prices. $RHHBY

Ontruzant is the 5th biosimilar of Herceptin to launch in the US after $AMGN $MYL $PFE &amp; $TEVA. 

https://t.co/0BfpDSaRFr