Hi mama! Ang 6 in 1 vaccine ay combination vaccine na nag-protect against six diseases in one shot, usually DPT (diphtheria, pertussis, tetanus), polio, hepatitis B, at Haemophilus influenzae type b (Hib). It's normally given starting at 6 weeks old, then followed by boosters at 10 weeks, 14 weeks, at may reminder dose pa around 1-2 years old depending sa schedule. Definitely ask your pediatrician about the exact timing at ingredients kasi may slight variations depending sa brand at hospital ninyo, one of my mum friends nag-check sa OB niya mismo ang complete schedule para hindi na confused sa vaccines.