My son is 4 months old had his 4th month IPV2 vaccine after that he is unable to play (bicycling his left leg in bed) only right he kicking, he has no pain and his fingers are ok, no sign of tumor nor anything on thigh near shot IPV2. And that leg also looks as healthy but except no energy in left leg. It has been 20 days (IPV2 vaccine) he still not moving his left leg as right. peas saying no problem wait 30 days (1 month) please help my little one. Thanks in advance