Is this just weakened immunity? or is influenza/pneumonia bug still in my system years later?

in 1999 i travelled to sydney city in australia for 6 months holiday/work, but I contracted possible influenza and pneumonia (the infection was bad: copious mucous, delirium, fevers, chest and throat pain & laboured breathing, shivers, etc. but not vomiting). i had taken the flu jab 5 years consecutively previous to my trip, but on the year of my trip I didn't have one. influenza A was reported to be circulating in this city in July/winter time when I contracted illness. on the plane home my eardrum was perforated. after a throat swab was taken i was told i had a respiratory infection. one year after unsuccessful atempts to eradicate repeated bouts from my system, i took two courses of Viral-Ex and the core virus symptoms seemed to disappear. However, annually since 1999 I have suffered from at least one 'lesser' infection of the 'flu' for example ear-ache or coughing - there is always mucous in my passages. is there a way to be rid of these re-infections for good?

These are not reinfections. You are contracting new "bugs". It may be your lungs were weakened by the original infection and made you more susceptible to future infections

Ask your doctor who know a lot more than regular people would know regarding your condition.