The HSE wishes to invite tender submissions for the supply and delivery of approximately 1,200,000 doses of 6 in 1 (Diphtheria, Tetanus, acellular Pertussis, Hepatitis B, Inactivated Polio Vaccine, Haemophilus Influenza Type B Conjugate) Vaccine fully compatible with the current primary immunisation schedule in Ireland, to be delivered over approximately 5 years contract duration (approximately 240,000 doses per annum). The drawdown may vary by 20 percent depending on the cohort requirement. The HSE reserves the right to extend the contract duration by up to two years where actual demand is less than forecasted demand.