Eradication of poliomyelitis

Global analysis for a general epidemiological model with vaccination and varying population

“…Buonomo et al [6] studied the traditional SIR model with 100% efficacious vaccine. Pulse vaccination was highly successful in the control of poliomyelitis and measles throughout central and south America (see [10,17]), and therefore has gained in prominence. Shulgin et al [18] incorporated it to an SIR epidemic model.…”

Quest for life-long protection by vaccination.

“…Polio-free zones are beginning to emerge in North Africa, southern and eastern Africa, the Middle East, Europe, and the Pacific Rim. In the Western Hemisphere, the last case of paralytic polio caused by a wild virus was identified in 1991 (41,42).…”

Polio Eradication From the Western Hemisphere

“…During these days, every child less than five years of age was offered vaccination, regardless of immunization status. Similar strategies were im plemented in Chile and Costa Rica where, as in Brazil, the impact on disease incidence was similar to that observed in Cuba (7,16). 1946 1950 1954 1958 1962 1966 1970 1974 1978 1982 1986 Year Source: Country Reports to PAHO Similar delivery strategies had been previously used by industrialized countries.…”

“…Of the 128 confirmed cases, 24 were associated with wild poliovirus isolation (7). The cases associated with isolation of wild poliovirus were located in three areas: 13 (all with type 3 isolates) in northwestern Mexico; three with type 3 and six with type 1 isolates in the northern Andean subregion; and two with type 1 isolates in northeastern Brazil.…”

“…Most important was the situation with smallpox (9), which proved that an infectious disease could be eradicated. By 1985, polio incidence had decreased sharply in most countries ( Figure 2), and the number of countries reporting cases of poliomyelitis in the Americas had decreased from 19 to 11 (7). Moreover, vaccine coverage levels for polio had reached all-time highs in many countries.…”