Confirmed Case:: A person diagnosed with measles was present in D.C. while contagious.
Exposure Locations & Times:
Amtrak Northeast Regional 175 Train Southbound: March 19, 7:30 p.m. - 1:30 a.m.
Amtrak Concourse, Union Station (50 Massachusetts Ave. NE): March 19, 11 p.m. - 1:30 a.m.
MedStar Urgent Care Adams Morgan (1805 Columbia Road NW): March 22, 7 p.m. - 11 p.m.
Public Health Advice:: Anyone present at these locations during the specified times, especially if unvaccinated, should monitor for symptoms for 21 days. Contact a healthcare provider *before* visiting if symptoms appear.
Recent Trend:: This case follows recent measles diagnoses in nearby Howard and Prince George's Counties in Maryland, often linked to international travel.
Why this matters:: Measles is extremely contagious and can lead to serious complications. Public awareness of exposure sites helps limit further spread, especially among unvaccinated individuals.
Measles is a viral respiratory illness known for its high transmission rate. According to the CDC, if one person has measles, up to 9 out of 10 unvaccinated people close to that person will also become infected. The virus spreads through the air when an infected person coughs or sneezes. Symptoms typically appear 7-14 days after infection and include high fever, cough, runny nose, watery eyes, and eventually a characteristic rash starting on the face and spreading downwards. Tiny white spots (Koplik spots) may appear inside the mouth before the rash.
The D.C. area has seen a cluster of cases recently, though officials noted the previous Maryland cases were linked to international travel and not connected to outbreaks elsewhere in the U.S. It is currently unclear if the D.C. patient had traveled internationally or their vaccination status.
Nationally, the CDC reported 285 measles cases in 2024, with 89% occurring in unvaccinated individuals. Vaccination, primarily through the Measles, Mumps, and Rubella (MMR) vaccine, is the most effective protection. Health officials emphasize the importance of maintaining high vaccination rates to prevent wider community spread. Dr. Glenn Wortmann of MedStar Washington Hospital Center noted that while measles is rare, hospitals are equipped with protocols like negative pressure rooms to manage infectious patients safely.
What should I do if I was at one of the exposure locations?
If you are unvaccinated or unsure of your vaccination status, monitor yourself for measles symptoms (fever, cough, runny nose, rash) for 21 days after the potential exposure date. If symptoms develop, isolate yourself immediately and call your healthcare provider or the D.C. Health Department (844-493-2652) *before* going to a clinic or hospital.
How contagious is measles?
Measles is highly contagious. The virus can live for up to two hours in an airspace where an infected person coughed or sneezed. Up to 90% of susceptible people nearby can become infected.
How is measles prevented?
The MMR vaccine is highly effective at preventing measles. Two doses are recommended for children, providing lifelong protection for most people.
Who This Affects Most:: Unvaccinated individuals, infants too young for vaccination, and those with weakened immune systems are at the highest risk.
How to Prepare:
Check your and your family's vaccination records. Ensure everyone eligible is up-to-date on their MMR vaccine.
Be aware of measles symptoms.
If you suspect exposure and are unvaccinated, follow public health guidance regarding monitoring and contacting healthcare providers.
Key Actions:: If potentially exposed, monitor for symptoms. If symptoms appear, isolate and call a healthcare provider before seeking care in person. Verify your MMR vaccination status.
Do you think enough people are aware of the importance of the MMR vaccine? Let us know!
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