For the duration of the 16 and 17, the Australian was part of an Oasis Bible Tour group that toured the Met.
From there, the man went to the Watchtower Educational Center in Putnam County on February 19 and stayed at the Best Western hotel in Brooklyn that night.
The timeframes represent the hours that the individual was in the area plus 2 hours after, as the viral particles remain alive in the air and on surfaces. Individuals first develop a fever, then may have a cough, runny nose and watery eyes and finally, a rash appears.More news: Transgender wrestler Mack Beggs wins second title
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According to a statement from DOH, measles is a highly contagious respiratory disease caused by a virus that is spread by direct contact with nasal or throat secretions of infected people.
Although the risk of developing the virus is low for those who have been immunised, the episode is noteworthy given New York City's population density and the Australian's travel route.
Measles was declared eliminated from the USA in 2000, meaning that any native reservoir of the virus has been cleared out (the virus only infects humans). Individuals should receive two doses of MMR vaccine to be protected. In 2013, a measles outbreak hit two orthodox Jewish neighborhoods in Brooklyn.
Earlier this month, Allegheny County reported a measles case in a Carnegie Mellon University student, and officials at Penn State's University Park campus reported four confirmed cases of mumps among students there. And according to data collected by the American Academy of Pediatrics, it's estimated that almost 95 per cent of eligible people in NY have received the combination measles, mumps, and rubella, or MMR, vaccine, which is 97 per cent effective against measles. The original source - who caught it during a trip to London - as well as the 57 people who caught it were all unvaccinated. In some cases that situation can also get serious for the patients. People most at risk are those with weakened immunity systems and individuals who have not been vaccinated.
Australia's overall vaccination coverage rate is good, according to the country's National Center for Immunization Research & Surveillance.