The DPT vaccine is given toyoung babies to protect them from – (1) diphtheria, polio and tetanus (2) diphtheria, pneumonia and tuberculosis (3) diphtheria, smallpox and tetanus (4) diphtheria, whooping cough and tetanus
(4) diphtheria, whooping cough and tetanus Explanation: DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough) and tetanus. The vaccine components include diphtheria and tetanus toxoids, and killed whole cells of the organism that causes pertussis.