Luckily it was not the sort of virus that the DoH's sexual health team concern themselves with, but one of a technical variety.
We have been reliably informed that several unsuspecting PROs across the capital arrived at their desks on Valentine's Day to find an unsolicited eCard greeting.
How so? It transpires that somebody managed to get hold of trade body London Councils' press and publicity contact list.
Diary's attempts to track down the culprit have so far drawn a blank, with London Councils senior media relations officer Stuart Henderson quick to rule himself out.
'It wasn't from me!' he insists.