Isabel Zendal y la épica historia de la VACUNA contra la VIRUELA

Isabel Zendal: A Pioneer in Vaccination

Early Life and Background

• Isabel Zendal Gómez was born in Galicia in 1771 to an extremely poor family. Her mother died of smallpox when Isabel was just 13 years old, highlighting the disease's historical lethality.

• Despite her challenges, she became the director of the Orphanage of Charity in La Coruña, where she improved living conditions significantly for the children, providing them with a second chance at life.

The First International Nursing Mission

• In 1803, Isabel became the first nurse in history to participate in an international mission, caring for children while transporting the world's first vaccine against smallpox.

The Discovery of Vaccination

• Edward Jenner discovered vaccination in 1796 after learning from a milkmaid that cowpox could protect against smallpox. This led him to inoculate James Phipps with cowpox material.

• After being inoculated with human smallpox six weeks later, James remained healthy, proving that cowpox provided immunity against smallpox.

Historical Context and Variolation

• Although Jenner is credited with creating vaccination, similar methods existed before him. Variolation involved exposing individuals to small amounts of smallpox virus and had been practiced since at least 1715 by Lady Mary Wortley Montagu.

The Expedition to Spread Vaccination

• Francisco Xavier de Balmis convinced King Carlos IV of Spain to fund an expedition to spread vaccination across overseas territories due to personal losses from smallpox.

• Isabel and 22 uninfected children were crucial for this mission; they served as carriers for transmitting the vaccine through inoculation every nine or ten days.

Challenges During the Voyage

• The success of the expedition relied heavily on Isabel’s care; without her efforts, many children would not have survived long enough to deliver the vaccine effectively.

Establishing Vaccination Practices

• The goals included spreading vaccination knowledge throughout Spanish colonies and establishing "Vaccination Boards" for ongoing immunization efforts.

Expedition of Balmis and the Role of Isabel Zendal

Overview of the Expedition

• The expedition split into two groups: Balmis and the speaker headed to Cuba and Mexico, while Salvany and Grajales traveled to Colombia, Peru, Buenos Aires, and Chile.

• In Mexico, numerous vaccination boards were established; Balmis continued his work with a group of vaccinated children.

• Balmis later sought permission to travel from Macao to China during their time in the Philippines before returning to Acapulco.

Challenges Faced by the Expedition

• Due to fatigue and illness, Balmis handed over leadership to Antonio Gutiérrez as he returned to Lisbon.

• Salvany faced severe health issues after traveling through multiple countries for seven years; he suffered from malaria, diphtheria, tuberculosis, and lost vision in one eye.

Legacy of Isabel Zendal

• Isabel Zendal is honored with a national nursing award in Mexico since 1975 for her contributions as the only female nurse on this historic expedition.

• She is recognized as the "first nurse in Hispanic medicine" and internationally acknowledged as "the first pediatric nurse in history."

Impact of Vaccination Efforts

• The school of nursing named after Isabel has a motto emphasizing selfless sacrifice without seeking glory.

• Governments eventually made vaccinations mandatory to control smallpox outbreaks despite opposition claiming it was witchcraft.

Conclusion on Public Health Measures