Valneva's chikungunya vaccine on track for FDA nod after long-term antibody data
The chikungunya virus met its match in Valneva’s vaccine candidate, VLA1553, according to data from an antibody persistence trial released today.
The trial found that 99% of 363 participants retained neutralizing antibodies 12 months after a single dose of vaccine in the company’s earlier, larger Phase III trial, called VLA1553-301. The participants from the long-term study will continue to be monitored for at least five years.
Valneva plans to finalize its BLA submission with the FDA by the end of this year. The program received FDA fast track and breakthrough therapy designations in 2018 and 2021. The larger Phase III study, VLA1553-301, in March showed that the vaccine generated a seroresponse rate of 96% six months after vaccination.
If the vaccine is approved, the company will be first into a global market for vaccines against chikungunya that could exceed $500 million annually by 2032, according to an estimate cited by Valneva from VacZine Analytics, a market research firm.
Valneva has already signed with the Instituto Butantan in Brazil for the development, manufacturing and marketing of VLA1553 to make it more accessible for low- and middle-income countries. And in November, the company hired GSK veteran Dipal Patel to be its chief commercial officer and help with a potential launch.
Valneva is the first company to bring a chikungunya vaccine into Phase III despite decades of efforts focusing on the tropical disease. Chikungunya, carried by mosquitoes, is a viral disease caused by the virus of the same name. It can cause fever, joint and muscle pain, headache, nausea, rash and chronic arthralgia. It often causes sudden large outbreaks, especially in the Americas. As of September 2020, there were more than three million reported cases in the Americas and it has spread to over 100 countries.