News and Views: Do You Know the Answers to These Questions about Measles?
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Vaccine Update for Healthcare ProvidersPublished on
Vaccine Update for Healthcare ProvidersCases of measles diagnosed by late May 2017 (90 cases by week ending May 20, 2017) have surpassed the total number of cases of measles during all of 2016 (83 cases). Although a significant outbreak has been occurring among the Somali community in Minnesota, cases are not limited to that geographic region. At least 11 states have had cases of measles diagnosed thus far in 2017. With summer travel underway and the ease with which measles can spread, it is important to consider measles as a possible diagnosis if a patient presents with fever and rash.
Are you ready? See if you know the answers to these questions about measles:
Answers are in the article that follows.
Measles virus spreads primarily through large respiratory droplets, but can also be spread for up to two hours by aerosolized droplets that remain in closed areas after the infected person vacates the area, such as an exam room or elevator. The virus is highly contagious and can be expected to infect up to 100 percent of susceptible individuals following exposure. For these reasons, people suspected of having measles should not share waiting rooms with others who might be susceptible. Transmission of the virus in waiting rooms has been documented.
The incubation period for onset of early symptoms is typically 10 to 12 days. Because rash onset typically follows a two- to four-day prodromal period, incubation from exposure to development of rash is about two weeks after exposure, but can occur up to three weeks later.
Given its contagiousness, measles can spread rapidly through a community and is, therefore, a reportable condition. If you suspect measles:
Measles vaccine is a live, weakened virus administered as part of the MMR vaccine. Vaccination is recommended at 12 to 15 months of age with a second dose between 4 and 6 years of age.
Unvaccinated students attending college or traveling internationally should get two doses of MMR separated by at least 28 days.
Adults born before 1957 are considered immune due to the prevalence of disease during their childhood. Adults born during or after 1957 who do not have evidence of immunity should get at least one dose of MMR vaccine, and if they are traveling internationally, they should get two doses.
Infants as young as 6 months of age who will be traveling internationally can be immunized before travel. For those between 6 and 11 months of age, one dose should be administered. For those 12 months or older, two doses separated by at least 28 days should be given.
For a series of resources, visit the EZIZ measles webpage. EZIZ is an e-learning and resource website for California’s VFC program.
Contributed by: Charlotte A. Moser, MS, Paul A. Offit, MD
Categories: Vaccine Update June 2017, News and Views About Vaccines
Materials in this section are updated as new information and vaccines become available. The Vaccine Education Center staff regularly reviews materials for accuracy.
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