Denis Young
Elder Lister
And you think they live longer because they get a flu vaccine and not because of their better health services?Guys in temperate countries - those who on average live longer than us by like 20 years taake the flu shot annually at the onset of winter.
Not related fully but just trust those who dedicate their lives into medicinal research
As you said, they have it at the onset of winter because it is quite possible for it to develop into chronic pneumonia because of the cold temps especially for less fortunate people with shitty heating.
Wewe yako ni ya kazi gani and you live kwa equator?