![Signage outside Merck & Co. headquarters in Kenilworth, New Jersey, U.S., on Monday, Jan. 25, 2021. Merck & Co. is discontinuing development of its two experimental Covid-19 vaccines after early trial data showed they failed to generate immune responses comparable to a natural infection or existing vaccines. Photographer: Christopher Occhicone/Bloomberg](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/KOVBWHCW7TG2J6SR2HFJLH2JTU.jpg?smart=true&auth=5e8dbc9567d885e7a753f32c5771bf77a3116f3c787194eb5cdb2fa5caa41675&width=400&height=225)
Signage outside Merck & Co. headquarters in New Jersey, US.. Merck is discontinuing development of its two experimental Covid-19 vaccines. Bloomberg
Signage outside Merck & Co. headquarters in New Jersey, US.. Merck is discontinuing development of its two experimental Covid-19 vaccines. Bloomberg
US drug company Merck ends Covid vaccine programme to focus on treatments
Disappointing trial results showing poor immune responses came as a shock to the company