I have just started sneezing, and got the first train out of Euston on Friday. With a dust mask on. I get plenty of them through work. I have to admit though, I did feel a little self concious. I did have one of the full perspex masks, with the twin filters either side, and the full length rubber guantlets (drain cleaning purposes), but I felt that would be a little OTT. I say did have, because someone has nicked them!
You cant trust anybody anymore. He probably had the bog roll as well.