Can micronutrient supplements prevent or treat respiratory tract infections?

Coughing, sore throat, runny nose, body aches, fatigue. The classic collection of symptoms synonymous with an acute respiratory tract infection. From the common cold right through to the flu, it is something most people are faced with many times over in their life. So what role nutrition, in particular micronutrient supplements, in helping to bolster your immune system to stop you from getting sick in the first place or helping to fight off an illness once an infection takes hold? In this pod...