[ml1201]

Have you been also bundling up to keep warm? A building in that kind of condition would probably also have massive drafts in them. And yes, if you are made to clean it again in cold health I'd report them and inform them that after working in the building you also started feeling sick (headaches and coughs) because feeling sick and having a headache with it is usually how I know I'm getting a sinus infection since I don't normally get headaches. :/