Hi, Thanks for writing to Health Care Magic, I am Dr Asad Riaz, I have closely read your question and I understand your concerns, I will hereby guide you regarding your health related problem. chills n Rigors can be due to many reasons like infection, drug reaction etc..as u r old n already had pneumococcal vaccine so reaction to this vaccine is rare but it can can.. either chills or Rigors due to poor technique of inj result infection at site of injection, or u having other infection coincidently at same time that may divert attention.. if u were my patient 1st I will give u evil Solicortif n make sure u it is not drug reaction, run other test make to rule out infection n do through exam n history n then treat accordingly.. I hope this answered your question, if you have more feel free to ask. Regards. Dr.Asad Riaz. General and Family Physician..