Rotavirus Surge Across US Raises Concerns Among Health Experts

A highly contagious digestive virus is spreading rapidly across the United States, with infection rates exceeding those of previous years, health experts warn.

Rotavirus, which causes acute gastroenteritis—inflammation of the stomach and intestines—has reached concerning levels according to the latest data from the Centers for Disease Control and Prevention. In the week ending April 4, 7.3% of 2,329 rotavirus tests came back positive, surpassing last year’s peak infection rate of 6.77%.

The virus primarily affects infants and young children, though outbreaks have also been documented in elderly populations, particularly in nursing homes. Symptoms include severe diarrhea, vomiting, fever, and stomach pain, which can lead to dangerous dehydration if not properly managed.

“We’re seeing a lot of rotavirus in the wastewater right now,” confirmed Dr. Marc Siegel, Fox News senior medical analyst. “Testing for rotavirus is way down, but the percentage of positive tests is up.” He noted that while the virus typically peaks in spring, it currently shows no signs of slowing down.

Declining Vaccination Rates Contributing to Surge

Health experts point to several factors behind the current surge, with declining vaccination rates topping the list of concerns.

“Vaccine rates are down overall among young children, as they decreased during COVID,” explained Dr. Patricia Pinto-Garcia, a medical editor at GoodRx based in California. “This means there’s a growing number of infants and young children who are vulnerable to infection.”

The rotavirus vaccine series must be completed by eight months of age, and with fewer children receiving these vaccines, the protective effect of herd immunity has diminished significantly. Dr. Siegel highlighted the serious impact of the virus before vaccination became widespread, when rotavirus resulted in 55,000 to 70,000 hospitalizations annually in the United States.

“I am concerned that the vaccination rate has been declining over the past seven years and is continuing to decline in the current climate of vaccine skepticism,” Dr. Siegel added.

Improved surveillance methods may also contribute to the higher reported numbers, though Dr. Pinto-Garcia emphasized that “rotavirus-related healthcare visits are also up, so improved detection is not the only reason we are seeing this spike.”

The COVID-19 pandemic’s disruption of normal infection patterns may also play a role, though experts believe the current surge cannot be attributed solely to post-pandemic rebound effects.

Transmission and Risk Factors

Dr. Zachary Hoy, a pediatric infectious disease specialist at Pediatrix Medical Group in Nashville, Tennessee, explained that rotavirus spreads via the fecal-oral route, meaning people become infected through contact with virus droplets from infected individuals or contaminated objects.

“This can lead to outbreaks, especially at schools where many young children share the same toys,” Dr. Hoy noted.

The virus poses particular danger to young children, who lack the physiological reserves of older children and adults. As a result, they can become dehydrated more quickly and develop more severe electrolyte imbalances, leading to more serious infections. In some severe cases, the virus can trigger seizures due to these imbalances.

Individuals with compromised immune systems or those taking immunosuppressive medications also face higher risks for severe and prolonged infections.

Treatment Approaches and Prevention

Since rotavirus is a viral infection, antibiotics are ineffective against it, and no specific antiviral treatment exists. Medical care typically focuses on managing symptoms and preventing complications.

“The mainstay of treatment is hospitalization for rehydration via intravenous (IV) fluids,” Dr. Hoy explained. “Sometimes it can take up to two to three days of IV fluids to help get patients rehydrated.”

Blood tests are often necessary to monitor electrolyte levels, and some patients may require specialized IV solutions or individual electrolyte supplements to correct imbalances.

Dr. Daniel Park, medical director of the Pediatric Emergency Department at UNC Health in Chapel Hill, North Carolina, advised that while most children recover with supportive care, parents should seek medical attention if their child shows signs of dehydration, such as decreased urination, lethargy, or inability to keep fluids down.

“While rare, rotavirus can be life-threatening in vulnerable populations, especially very young infants or children with underlying medical conditions,” Dr. Park warned.

Prevention remains the most effective strategy against rotavirus. Two vaccines are currently available—Rotateq (a three-dose series) and Rotarix (a two-dose series)—which are administered orally beginning at two months of age.

“It’s important to get the rotavirus vaccines on schedule, because these younger infants are at greatest risk if they get rotavirus,” Dr. Hoy emphasized.

Regular handwashing with soap and water also plays a crucial role in preventing transmission, particularly in group settings like schools and daycare facilities where the virus can spread rapidly among children.