In 2011 I had swine flu which resulted in ARDS and was assured this is rare and a one off event. I've just left hospital following another bout of ARDS caused by flu A - yes, I was vaccinated! I'm terrified this may now happen again and just can't come up with any way of preventing it - I already do everything I can do. This feels like such a Damocles sword over my head. Any advice?