# Measles and Whooping Cough Surge as Vaccination Coverage Drops
Measles and whooping cough cases are climbing across the United States, driven by declining vaccination rates that leave communities vulnerable to diseases once thought largely controlled. Doctors warn that falling immunization coverage creates pockets of unprotected populations where these highly contagious infections spread rapidly.
Measles transmits through respiratory droplets and infects about 90 percent of unvaccinated people exposed to the virus. The disease causes fever, cough, and characteristic rash, but can lead to pneumonia, brain inflammation, and death in severe cases. Whooping cough, caused by the bacterium Bordetella pertussis, produces weeks of severe coughing fits that can be life-threatening in infants and young children.
Both diseases were once endemic killers. The MMR vaccine (measles, mumps, rubella) reduced measles deaths by 73 percent globally since 2000, according to the World Health Organization. Pertussis vaccines similarly transformed public health outcomes. Yet vaccination hesitancy driven by misinformation and declining trust in public health institutions has eroded herd immunity thresholds needed to prevent outbreaks.
The CDC tracks vaccination coverage rates, and recent data shows measles coverage has dropped below 95 percent in some U.S. regions. This threshold matters because measles requires population immunity above 95 percent to prevent sustained transmission. Whooping cough protection also weakens as vaccination rates slip.
Physicians emphasize that MMR and Tdap vaccines remain safe and effective. The MMR vaccine prevents approximately 97 percent of measles cases in vaccinated individuals. Tdap protects against tetanus, diphtheria, and pertussis. Both vaccines carry minimal serious side effects compared to the diseases they prevent.
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