While several companies have reported positive COVID-19 vaccine data, including signs of efficacy against the more dangerous emerging strains of the virus, Merck & Co., Inc. is pivoting from vaccines to prevent SARS-CoV-2 infection to therapeutics for those already infected as Phase I data for its vaccine candidates yielded disappointing results.
The drug maker said on 25 January that it would discontinue development of its two vaccine candidates, V590 and V591, after in-house data showed they were well-tolerated but produced immune responses inferior to those seen with natural infection and other vaccines