Coronavirus Update: Another Vaccine Disappointment For GSK

Plus: UK Increases Order From Valneva

After suffering a setback in its joint venture with Sanofi, GlaxoSmithKline has been dropped by another vaccine partner, Clover, as it looks for the best adjuvant for its COVID-19 candidate.  

Brazil COVID-19 vaccination
Rio De Janeiro, Brazil: A senior receives the CoronaVac vaccination at a drive-thru vaccination center, as priority vaccination of the elderly gets underway in the city. The vaccine was developed by China’s Sinovac in partnership with Brazil’s Butantan Institute • Source: Getty Images

Clover Biopharmaceuticals has pulled the plug on its partnership with GlaxoSmithKline to develop a COVID-19 vaccine using the UK giant's adjuvant, plumping instead to go into late-stage trials with an adjuvant from Dynavax Technologies Corporation of the US.

China-headquartered Clover had been evaluating its protein-based S-Trimer COVID-19 vaccine in a Phase I trial with two adjuvant, one from GSK and the other from Dynavax. While both performed well and induced high levels of neutralizing antibodies while demonstrating favorable safety and tolerability profiles, Clover is to initiate a global Phase II/III study using Dynavax's CpG 1018 plus alum adjuvant due to its "differentiated, beneficial reactogenicity and safety profile which could make it attractive for a broad population of peoples," the Chengdu-based group said

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