I thought this 'flu was supposed to be incredibly infectious ? Both my younger son and one of my neighbours (they don't interact in any way) have had the 'flu, but I was talking to the neighbour's wife yesterday and no-one else in her family has come down with it and neither has anyone else in ours. She and I both 'nursed' the invalids, yet we're fine.....we've quietly decided it's a Man-Flu
No it is normally infectious. Saliva, bodily fruids, sweat.
Standard precautions.