PUBLIC health bosses have reassured parents that the new five-in-one-vaccination for babies is safe.
Doctors started receiving the jab yesterday.
Deborah Wilson, consultant in communicable disease control at the County Durham and Tees Valley Health Protection Unit, said: "The new baby immunisation has come to light because of improvements in technology and the only thing that parents will notice is that the oral polio drops have gone and it's less likely to cause any adverse effects."
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