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Over the summer of 1862 various ships reported high death tolls. The disease reduced the KwakwakaŹ¼wakw population by over 50%. Likewise there were harrowing reports about the Heiltsuk people of the Bella Bella area. On 18 July 1862 the Daily British Colonist reported that smallpox had killed about 60% of the Heiltsuk people. Robert Boyd ...
Smallpox was an infectious disease caused by variola virus (often called smallpox virus), which belongs to the genus Orthopoxvirus. [7] [11] The last naturally occurring case was diagnosed in October 1977, and the World Health Organization (WHO) certified the global eradication of the disease in 1980, [10] making smallpox the only human disease to have been eradicated to date.
Most people became infected during their lifetimes, and about 30% of people infected with smallpox died from the disease, presenting a severe selection pressure on the resistant survivors. [ 26 ] In northern Japan, Ainu population decreased drastically in the 19th century, due in large part to infectious diseases like smallpox brought by ...
The disease killed an estimated 400,000 Europeans annually during the 19th century and one-third of all the blindness of that time was caused by smallpox. 20 to 60% of all the people that were infected died and 80% of all the children with the infection also died. It caused also many deaths in the 20th century, over 300–500 million.
Smallpox was a dangerous disease caused by the variola major virus. The most common type of smallpox, ordinary, historically has devastated populations with a 30% death rate. The smallpox virus is transmittable through bodily fluids and materials contaminated with infected materials.
Due to the long time spans, the first plague pandemic (6th century – 8th century) and the second plague pandemic (14th century – early 19th century) are shown by individual outbreaks, such as the Plague of Justinian (first pandemic) and the Black Death (second pandemic). Infectious diseases with high prevalence are listed separately ...
The first known smallpox epidemic to strike the native peoples of the coastal and interior Pacific Northwest arrived in the early 1770s, devastating large swathes of the population and causing significant demographic collapse – both from the disease itself and corresponding malnutrition from the deaths of hunters within tribes.
The Massachusetts smallpox epidemic or colonial epidemic was a smallpox outbreak that hit Massachusetts in 1633. [1] Smallpox outbreaks were not confined to 1633 however, and occurred nearly every ten years. [2] Smallpox was caused by two different types of variola viruses: variola major and variola minor. [3]