• Country Operations: Costa Rica
• Training Activities
• Epidemiology: Poliomyelitis in the Americas, 1976-1978
• EPI Revolving Fund
• Cold Chain
• Control of Vaccine for the EPI Program
• Effects of Thawing and Freezing on Oral Polio Vaccine
• Incidence of EPI Diseases in the Americas: 1978-1979
• Newsbriefs