Rotavirus is one of the most common causes of severe diarrhoea in infancy. The illness itself and how to monitor it at home is covered in a separate article: rotavirus diarrhoea. This page is about the vaccine: how many doses, at what age, why it is not in the national schedule, and when it should not be given.

How is it given?

The rotavirus vaccine is not an injection. It is given by mouth, as drops. It contains live attenuated virus and builds local immunity in the gut. Unlike other vaccines it is not given into the muscle and leaves no mark on the arm.

How many doses and when?

Two products are available and the number of doses differs.

Schedule Doses Months given Deadline for last dose
Two-dose 2 Around 2 and 4 months 24 weeks
Three-dose 3 Around 2, 4 and 6 months 32 weeks

Whichever product the course starts with should preferably finish it. At least four weeks are left between doses.

Why does the age window matter so much?

Timing is stricter here than with most vaccines:

  • The first dose is not given before 6 weeks and must be started by 15 weeks at the latest.
  • The final dose must not pass 24 or 32 weeks depending on the product, that is, not beyond 8 months.

Once the window closes the vaccine is not given, because the background risk of bowel obstruction (intussusception) rises with age. This is not a vaccine that can be left for later; the decision belongs to the early months.

Why is it not in the national schedule?

Turkey's national programme provides free protection against 13 diseases; rotavirus is not among them. It sits in the group of optional (private) vaccines and is paid for by the family. Current pricing varies by centre and is better discussed at the visit.

Not being in the programme does not mean the vaccine is unimportant. The World Health Organization recommends including rotavirus vaccination in national programmes, and it is routine in many countries.

What are the side effects?

Usually mild and self-limiting:

  • A few days of irritability
  • Temporarily looser stools or mild diarrhoea
  • Rarely, vomiting

Because it is given by mouth, fever and injection-site reactions are not expected. The rare situation to watch for is intussusception: within the first week after the dose, severe colicky abdominal pain, persistent vomiting, crying spells with the knees drawn up, or blood in the stool need prompt assessment.

Who should not receive it?

  • Babies with a previous episode of intussusception
  • Those with an uncorrected structural bowel abnormality
  • Those with severe combined immunodeficiency (SCID)
  • Those with a history of severe allergic reaction to a component of the vaccine

A mild cold is not a reason to postpone. With moderate or severe illness, diarrhoea or vomiting, the dose is delayed until recovery.

We missed a dose — what now?

If you are still inside the age window the course does not restart; it continues from where it stopped. If the window has closed, the remaining doses are not given. This is why the 2-month check matters: the other scheduled vaccines are given at the same visit.

Can it be given with other vaccines?

Yes. The rotavirus vaccine can be given in the same session as the other vaccines at the 2- and 4-month checks; no interval is needed. The full schedule month by month is on the 2026 vaccination schedule page.

In short

The rotavirus vaccine is an oral, two- or three-dose optional vaccine. Its timing is strict: first dose by 15 weeks, last dose before 8 months. It aims to reduce severe diarrhoea and hospital admission. If your baby is inside that window, it is worth discussing at the 2-month check.