As NVIC writes http://www.nvic.org/vaccines-and-diseases/Rotavirus.aspx http://www.nvic.org/vaccines-and-diseases/Rotavirus.aspx http://www.nvic.org/vaccines-and-diseases/Rotavirus.aspx 90 percent National Vaccine Information Center https://www.nvic.org/vaccines-and-diseases/Rotavirus.aspx http://www.nvic.org/vaccines-and-diseases/Rotavirus.aspx several hours http://www.nvic.org/vaccines-and-diseases/Rotavirus.aspx http://www.nvic.org/vaccines-and-diseases/Rotavirus.aspx As NVIC writes http://www.nvic.org/