Injections are one of the most common health care procedures, with some 16 billion injections administered world-wide each year. Most injections (90 to 95 percent) are given for therapeutic purposes, and only 5 to 10 percent are given for immunization. Injections are often unnecessary and are...

Immunization deserves high priority, especially in developing countries, for three reasons: vaccine-preventable diseases, disproportionately affect the poorest fifth of the population; immunization is among the most cost-effective interventions, and has a major impact in reducing the burden of...