Rotavirus
A highly contagious viral intestinal infection that can cause severe vomiting, watery diarrhea, and dehydration in infants and young children.
What causes Rotavirus?
Rotavirus is caused by rotaviruses that spread mainly by the fecal-oral route through contaminated hands, objects, food, or surfaces. The virus is stable in the environment and only a small amount can infect a child.
Symptoms and what to notice
Watery diarrhea, vomiting, fever, and abdominal pain. Dehydration signs include fewer wet diapers, dry mouth, no tears, unusual sleepiness, sunken eyes, or dizziness.
How long can it last?
Symptoms usually begin about two days after exposure and commonly last 3 to 8 days. Viral shedding may continue after symptoms improve.
How serious is Rotavirus?
Severe dehydration can require emergency or hospital treatment and may be life-threatening. Young infants and children with immune problems face greater risk.
Treatment and management
No specific antiviral treats rotavirus. Oral rehydration solution and continued feeding are central; severe dehydration requires intravenous fluids. Antibiotics do not help.
Vaccine: who and when?
Rotarix (RV1) is a two-dose oral series at ages 2 and 4 months. RotaTeq (RV5) is a three-dose oral series at 2, 4, and 6 months. The first dose must begin before 15 weeks of age and all doses must be completed by 8 months.
Cost note: Patient cost varies by product, provider, insurance, location, and eligibility. Many recommended vaccines are covered in network without cost sharing, and qualifying children may use the Vaccines for Children program.
Trusted source
Patient cost varies by insurance, provider, location, and eligibility. Coverage and public-health access differ, so listed prices are examples rather than guaranteed patient prices. This page is for general education and does not replace individualized medical advice, diagnosis, vaccination assessment, or treatment.
Rotavirus: Symptoms, Causes, Treatment, Prevention, and Vaccine Information
Before routine vaccination, nearly every U.S. child developed rotavirus gastroenteritis by age five and many required emergency or hospital care. Oral infant vaccination dramatically reduced severe disease and hospitalization. The vaccine schedule has strict upper age limits, so missed opportunities early in infancy cannot always be recovered later.
Important: This page is for general education. It does not replace diagnosis, treatment, vaccination advice, or emergency care from a qualified healthcare professional.
Quick Facts
| Topic | Current information |
|---|---|
| Cause | Rotavirus is caused by rotaviruses that spread mainly by the fecal-oral route through contaminated hands, objects, food, or surfaces. The virus is stable in the environment and only a small amount can infect a child. |
| Main symptoms | Watery diarrhea, vomiting, fever, and abdominal pain. Dehydration signs include fewer wet diapers, dry mouth, no tears, unusual sleepiness, sunken eyes, or dizziness. |
| Typical course | Symptoms usually begin about two days after exposure and commonly last 3 to 8 days. Viral shedding may continue after symptoms improve. |
| Treatment | No specific antiviral treats rotavirus. Oral rehydration solution and continued feeding are central; severe dehydration requires intravenous fluids. Antibiotics do not help. |
| Vaccine status | Rotarix (RV1) is a two-dose oral series at ages 2 and 4 months. RotaTeq (RV5) is a three-dose oral series at 2, 4, and 6 months. The first dose must begin before 15 weeks of age and all doses must be completed by 8 months. |
History and Public-Health Importance
Rotavirus was identified as a major cause of childhood diarrhea in the 1970s. An earlier U.S. vaccine was withdrawn because of intussusception risk. Large safety trials supported the modern Rotarix and RotaTeq vaccines, which carry a small intussusception risk but prevent far more hospitalizations and severe cases than they cause.
What Causes Rotavirus?
Rotavirus is caused by rotaviruses that spread mainly by the fecal-oral route through contaminated hands, objects, food, or surfaces. The virus is stable in the environment and only a small amount can infect a child.
Virus is shed in very high amounts in stool and spreads easily during diapering and through toys, hands, and surfaces. Good hygiene helps but cannot fully control rotavirus because it is environmentally hardy and highly infectious. Reinfection can occur, although later illness is often milder.
Symptoms and Typical Course
Watery diarrhea, vomiting, fever, and abdominal pain. Dehydration signs include fewer wet diapers, dry mouth, no tears, unusual sleepiness, sunken eyes, or dizziness.
Vomiting often begins first, followed by several days of watery diarrhea and fever. Children can lose fluid rapidly. Adults may have mild or no symptoms but can spread virus. Natural infection and vaccination build partial protection against severe future disease.
Complications and Who Is at Higher Risk
Severe dehydration can require emergency or hospital treatment and may be life-threatening. Young infants and children with immune problems face greater risk.
Dehydration and electrolyte abnormalities are the main threats. Signs include reduced urine, dry mucous membranes, lethargy, fast heart rate, and poor circulation. Rarely, severe dehydration causes seizures, kidney injury, shock, or death.
How It Is Diagnosed
During typical illness, diagnosis is often clinical and does not require testing. Stool antigen or molecular tests may be used in severe cases or outbreaks. Clinicians also consider norovirus, bacterial infection, foodborne toxins, medication effects, and noninfectious causes.
Treatment and Recovery
No specific antiviral treats rotavirus. Oral rehydration solution and continued feeding are central; severe dehydration requires intravenous fluids. Antibiotics do not help.
Give frequent small amounts of oral rehydration solution and continue breastfeeding. Plain water alone may not replace electrolytes in significant diarrhea. Intravenous fluids are used when a child cannot drink or has severe dehydration. Anti-diarrheal medicines are generally not used in young children without clinician direction.
Vaccine Information
Rotarix (RV1) is a two-dose oral series at ages 2 and 4 months. RotaTeq (RV5) is a three-dose oral series at 2, 4, and 6 months. The first dose must begin before 15 weeks of age and all doses must be completed by 8 months.
Both vaccines are live attenuated and given by mouth, not injection. If any dose uses RotaTeq or the product is unknown, a total of three doses is used. A history of intussusception or severe combined immunodeficiency is a contraindication. Mild spit-up does not usually require repeating the dose. The schedule must finish by age eight months.
Prevention
Vaccinate on time, wash hands after diapering, disinfect contaminated surfaces, wash soiled laundry, and keep sick children away from shared childcare activities according to policy. Vaccination is the most effective protection against severe disease.
When to Seek Medical Care
Seek urgent care for very few wet diapers, inability to drink, repeated vomiting, bloody stool, severe pain, marked sleepiness, sunken eyes, cool mottled skin, or symptoms in a very young infant.
Frequently Asked Questions
Is rotavirus vaccine injected?
No. Rotarix and RotaTeq are oral liquid vaccines.
Can an older child start the series late?
No. The first dose has an upper age limit, and all doses must be completed by eight months.
Can vaccinated children still get rotavirus?
Yes, but vaccination greatly lowers the chance of severe dehydration and hospitalization.
Do antibiotics treat it?
No. Rotavirus is viral; treatment focuses on fluid replacement.
Key Takeaway
Rotavirus can dehydrate infants quickly. On-time oral vaccination and early rehydration prevent most severe outcomes.
Medical, treatment, and vaccine information was reviewed against official U.S. public-health guidance available through September 2026.