A critical window to stop hantavirus is opening. Not all countries are managing exposed travelers the same way

— is roughly three weeks.

The last person to fall ill on the ship was a German passenger who died May 2, the same day researchers identified the cause of the infections. Until then, passengers had not known they needed to take precautions.

Though not everyone on board may have been exposed – or exposed at the same time – the May 2 date is a rough marker continue reading …