Still, the EMA said there were limited data on how effective Valneva's vaccine might be against the virus' omicron variant and its subvariants, which are currently fueling surges of cases across Europe. The EMA said the side effects from Valneva's shot were mostly mild, including aches, nausea and tiredness.
Valneva's vaccine is made using the same technology used for flu and polio shots. It uses a killed version of the COVID-19 virus, which primes the body to make antibodies against it. The vaccine also contains adjuvants, or ingredients to boost the immune response.