Gray calls potato varieties that are symptomless carriers of PVY "Typhoid Marys
." They hamper seed-certification programs' ability to identify virus-infected seed lots.
But in light of the highly publicized threat of a flu pandemic, businesses may want to exercise more control over their own Typhoid Marys
The Tories stir up xenophobia by accusing some people of moving to Britain to engage in crime, to play the benefits system or, most recently and most shamefully, brand them as 'Typhoid Marys
' carrying dread diseases to infect our sceptred isle.
Thanks to the advent of new drugs, HIV is one of the rare, fatal infectious diseases that can now exist in people who are largely healthy, potentially creating thousands of Typhoid Marys
to keep the virus alive and kicking in new victims.
We called them the Typhoid Marys
of the paranoia that had become our chronic national neurosis encouraging adversarialism and gridlock.