The students, along with another infected Sunset Park resident, all reported spending time in area's where the measles virus has been active.
According to infection control specialist Wendy Gullicksrud at CHI St. Joseph's Community Health, the answers depend on a variety of circumstances and the most up-to-date information can be found on the Center for Disease Control and Prevention (CDC) website. "It has brought even more to the forefront the idea that you don't only vaccinate for your kids' safety, but you vaccinate for others besides".
Cases of the measles have spiked this year with more than 760 now reported nationwide - the most since 1994, when the United States had 963 cases, according to The Associated Press.
Krissy Mosbarger, whose son has autism, said she believes in vaccinating but on a different schedule than the state recommends. Children who have had chemo, where their immune system is low, can't do the vaccination.
The problem this year includes, although it's not limited to, dozens of people who contracted measles while traveling internationally, triggering outbreaks among mostly unvaccinated populations.
The city Health Department announced Tuesday that the number of measles cases in the city has hit 466 since the outbreak began in October.
Exclusions from class can be ordered in Spokane by the health district if just one case of measles appears in a school, said spokeswoman Kim Papich. In a new report, the World Well being Group warns weak folks to get vaccinated - particularly if they plan on touring. If you're in a higher-risk situation, though, the CDC recommends that you get the second dose.More news: Pamela Anderson is the first person to visit Julian Assange in jail
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'I would guess that we're still going to see more cases, but the rate at which it goes up will depend on how well-contained the current outbreaks are, ' says Dr Esper. Despite how easily vaccination can prevent measles, Rachel Fearns, an associate professor of microbiology at Boston University and an investigator at the National Emerging Infectious Diseases Laboratories, wants us to remember that "it is not a benign infection, at all".
One dose of MMR is 93% effective at preventing measles; two doses is 97% effective. Most cases are in unvaccinated or under-vaccinated people.
And it added governments should 'identify who has been missed in the past and reach them with the vaccines they need'.
In the decade before the vaccination was developed, CDC records show 3 to 4 million people got measles each year in the U.S. Of those people, 400 to 500 died, 48,000 were hospitalized, and 4,000 developed encephalitis, or brain swelling, from the disease.
Anyone over 30 may not still have the antibodies they need to fight the infection circulating.
America is now facing multistate measles outbreaks that show no signs of slowing down, thanks to false information about vaccine risks and an increase in worldwide travel.