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“Obviously, we have some asymptomatic shedders at very low levels,” said McAfee.

Walters did pronounce herself guilty of being “dreadfully sentimental” at times and was famous for making her subjects cry, with Oprah Winfrey and Ringo Starr among the more famous tear shedders.

When this line turns pinkish or red, the crab is referred to as a “shedder.”

Authorities and experts are investigating the cases for possible re-infection or whether they are persistent shedders from their earlier infection, the health ministry said.

It found that a small percentage of people might be long-term “shedders” of the virus — for up to 22 days.