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Shortly afterward, he suffered an acute hearing loss, according to German state broadcaster DW, and was only able to hear distorted tones.

However, on Feb. 28, 2016, in the midst of AC/DC’s Rock or Bust tour, doctors told Johnson that if he didn’t stop performing immediately, he risked total hearing loss.

One in ten measles infections results in an ear infection, often accompanied by bacterial sepsis, and can result in hearing loss.

That’s because an infection during pregnancy can cause microcephaly, which is when a baby's head is much smaller than expected, and other congenital malformations like limb contractures, high muscle tone, eye abnormalities, and hearing loss.

He maintained an optimistic outlook, telling Utah newspaper Desert News that hearing loss didn't bother him.