Collin County Reports Chickenpox Surge Amid Falling Vaccination Rates

Six chickenpox cases surfaced in Collin County in a single week, prompting Collin County Health Care Services to issue a public health alert on March 20 and raising alarm that the highly contagious virus could cross into neighboring Tarrant County as vaccination rates continue to slide.

Dr. Laura Romano, a pediatric hospitalist at Cook Children's Medical Center in Fort Worth, said the trajectory is predictable given what she has been watching in immunization data. "We have seen a steady decline in the vaccination rates of our incoming kindergartners across the board here in Texas," Romano said. "We're seeing these diseases begin to come back."

No cases have been confirmed in Tarrant County, but Romano was direct about the risk. "It's only a matter of time before we start seeing cases trickle in over here," she said. "The fear is it's slowly going to spread from one county to the other."

The driver, Romano said, is not just geography but behavior: parents across the region are opting out of vaccines that once made chickenpox a rarity in American classrooms. "We know that across the board, vaccination rates are beginning to fall for all vaccine-preventable diseases, including chicken pox, here in Tarrant County," she said.

The varicella-zoster virus spreads with particular speed through schools and childcare centers, and health officials warn that sick children must be kept home immediately. Chickenpox is a reportable condition under Texas law, meaning any case must be disclosed to the local health department. Collin County Health Care Services identified that legal obligation as a critical tool for containing the current outbreak.

Romano cautioned that parents may not recognize chickenpox until it has already spread, because the rash is rarely the first symptom. "It starts with a few days of running a fever, maybe having a sore throat, some muscle aches, just not feeling your best," she said. In children, the rash is often the first visible sign; in adults, a mild fever typically appears one to two days before the rash develops.

While chickenpox is mild for most people, it can cause serious complications in young children, pregnant women, and anyone with a compromised immune system. Unvaccinated individuals face the greatest risk. Health officials said early detection and vaccination remain the most effective tools for keeping the outbreak contained within Collin County.