Dr Gary Stack talks to Senior Times Presenter Conor O'Hagan about MSD's Winter campaign

Called #knowPneumo

Pneumo, or Pneumococcal disease, is a major cause of illness and death in Ireland, particularly among the very young, the elderly and those with a weakened immune system

Pneumo is caused by a common bacterium, Streptoccocus pneumoniae, which can attack different parts of the body.

Dr Gary Stack answers all our tough questions