| Date: 2025/09/29 | File Size: 38.76 MB |
| Duration: 00:00:18 | Frame Size: 3840 x 2160 |
Two influenza or flu vaccine syringes are resting on a table of a drugstore in Tehatta, West Bengal, India, on September 13, 2025. The seasonal flu (influenza) vaccine Influvac Tetra is consisting of two type A strains (H1N1 and H3N2) and two type B strains (Victoria and Yamagata). According to the WHO, influenza, or ‘flu,’ is a highly contagious respiratory illness that is spreading easily through the air or when people are touching contaminated surfaces.