The bacteria is found in raw seafood, like oysters, and warm, brackish waters. Climate change may increase the risk of infections from the deadly bacteria farther north.
The 64-year-old pop icon was hospitalized for several days and remains under medical care, her agent said. A new start date for her tour has not been announced.
A review of archives suggests that efforts to protect Earth from contamination by any organism brought back from the lunar surface were mostly for show.