Victims of the rare virus suffer a high fever, headaches, diarrhoea, brain inflammation, nausea and internal bleeding.

BBC: Tropical virus man 'fighting for life'

And there is suspicion that many Q fever patients suffer symptoms such as fatigue and joint aches even years later.

BBC: Cull workers struck by rare fever

But if they suffer from mere hay fever, they'll have to try and fail both Claritin and nasal sprays like Flonase.

FORBES: Merck's Big Allergy Bet

The hosts laid siege to the Leinster line only for Easter and Will Skinner to both suffer a dose of whitewash fever, while just before the hour Care pounced on a turnover and chipped ahead, only for Luke Fitzgerald to race back to the rescue for the Irish.

BBC: Harlequins 5-6 Leinster