my baby is spitting out after every feed,and this is from last one week after his 6 weeks vaccination,what could be the reason for spitting after every feeds

A. if your baby is spitting curdled milk then you should not be worried at all because these are the signs for proper digestion but if you're a baby is vomiting milk as it is then after every feed you should hold your baby straight on the shoulder and give a Little tap on back so that baby will burp well