The Lancet
Jun 28, 2014 Volume 383 Number 9936 p2185 – 2268
http://www.thelancet.com/journals/lancet/issue/current

Viewpoint
Improving access to vaccines through tiered pricing
Dr Seth Berkley MD a
Immunisation is now widely recognised as one of the most efficient, successful, and cost-effective health investments in history, but despite a substantial effort over the past 50 years, nearly one in five deaths of children younger than 5 years is still caused by a vaccine-preventable disease. With more than 22 million children in the world still unimmunised against common but life-threatening diseases (as measured by a vaccine containing a third dose of diphtheria-tetanus-pertussis [DTP]), almost all in developing countries, there is clearly still a long way to go…