My 9week old had his jabs on Tuesday afternoon and has been off ever since which I've been told is normal but I had a bug on Tuesday!:( so my partner took him for them but today he's barely kept down 10 ounces ! And has been projectile vomiting everything else this is 20 ounces less then normal ? My partners mums a midwife and says he'll be fine but will he get too dehydrated?