With Rangers now wallowing in disarray, they may be ill-advised to hang around, even if they are given the invitation.

BBC: Chick Young's view

The idea is to use the scarf to cover your mouth and nose when around others who may be ill, or to sneeze into it so pathogens will be killed instead of lingering to infect others, the site recommends.

WSJ: Keeping Cold and Flu Germs Out

Around 700 people had to be tested for radioactive poisoning but none was seriously ill.

BBC: Who was Alexander Litvinenko?