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Greetings,Thank you for your question.I am Dr. Su S.I will try my best to help you.
I am sorry for his symptoms.As he vomited about an hour after vaccination, all part of the vaccine may not get out along with spitting.A very small amount of live virus mixed with spitting would not cause any infection.After cleaning the area, wash your hand well.We usually give 2-3 doses of rota virus vaccine.Third dose is usually optional.As he vomited in this dose, you should not miss the third dose.I hope this information will be helpful.If you have any query, please feel free to ask.If you are happy with my answer please click on the Excellent/Good rating. Wish his healthy life.Regards.