• Classification according to type of antigen

Live atenuated • Bacterial- (BCG) • Viral- mumps, measles, rubella(MMR), polio vaccine OPV( presently withdrawn), varicella vaccine, Rotavirus vaccine Inactivated-killed • Bacterial –pertussis ( DTP) • Viral- polio vaccine IPV, influenza vaccine, hepatitis A vaccine Component vaccines ( subunit vaccines) • Bacterial- Hib vaccine, meningococcus vaccine, pneumococcus vaccine, acellular pertussis• Viral- hepatitis B vaccine Toxoid vaccines- diphtheria and tetanus vaccines ( DTP)- toxoid- inactivated toxin