Which statement is true regarding the influenza virus?

The statement that influenza virus is transmitted through respiratory droplets is correct. The primary mode of transmission for the influenza virus occurs when an infected person coughs, sneezes, or talks, releasing respiratory droplets into the air. These droplets can then be inhaled by individuals in close proximity, facilitating the spread of the virus. This understanding underscores the importance of preventive measures, such as vaccination and practicing good respiratory hygiene, to protect against transmission.

The other statements do not accurately represent the characteristics of the influenza virus. The virus can be transmitted from surfaces, especially when a person touches a contaminated surface and then touches their face. Type A and Type B both have unique surface proteins, including hemagglutinin and neuraminidase, which play significant roles in infection. Additionally, the contagious period for influenza can begin one day before symptoms appear, making the timing of contagion more complex than just a few minutes after exposure.