True. I just came back fm Gp. For my cough. Yearly flu jab is useless!
Coughs are caused by headcolds not influenza. The most common cause of headcolds is the rhinovirus family.
https://en.wikipedia.org/wiki/Rhinovirus
Transmission and epidemiology
Main article: Common cold
Rhinoviruses may be spread via airborne aerosols, respiratory droplets and from fomites (contaminated surfaces), including direct person-to-person contact.[5]
Rhinoviruses are spread worldwide and are the primary cause of the common cold. Symptoms include sore throat, runny nose, nasal congestion, sneezing and cough; sometimes accompanied by muscle aches, fatigue, malaise, headache, muscle weakness, or loss of appetite. Most sinus findings are reversible consistent with a self-limited viral process typical of rhinovirus colds. Fever and extreme exhaustion are more usual in influenza. Children may have six to twelve colds a year.[citation needed] In the United States, the incidence of colds is higher in the autumn and winter, with most infections occurring between September and April. The seasonality may be due to the start of the school year[citation needed] and to people spending more time indoors thereby increasing the chance of transmission of the virus.[6] Lower ambient temperatures, especially outdoors, may also be a factor[7] given that rhinoviruses preferentially replicate at 32 °C (89 °F) as opposed to 37 °C (98 °F). The changes in temperature, humidity and wind patterns seem to be factors.[citation needed]
Those most affected by rhinoviruses are infants, the elderly, and immunocompromised people.[8]