Quadrivalent influenza vaccine (split virion, inactivated), Influvac Tetra suspension for injection in pre-filled syringe clinical trials

Optimizing the time of day of influenza vaccine administration in adults aged 60-85 years: A randomized controlled trial

This study is looking at the best time of day for people aged 60-85 to have their flu jab. We want to see if getting the vaccine at a certain time helps your body create more protection against the flu virus.