EJERCICIO ESCRITO

Lee el siguiente texto en pasado y presente simple. Corrige los errores en las frases verbales.


Spanish Flu Pandemic of 1918

The deadliest virus in modern history, perhaps of all time, is the 1918 Spanish Flu. It kill about 20 to 50 million people worldwide, perhaps more. The total death toll is unknown because medical records were not kept in many areas.

The pandemic hitts during World War I and devastates military troops. In the United States, for instance, more servicemen were killed from the flu than from the war itself. The Spanish flu were fatal to a higher proportion of young adults than most flu viruses.

The pandemic startes mildly, in the spring of 1918, but was followed by a much more severe wave in the fall of 1918. The war likely contributes to the devastating mortality numbers, as large outbreaks occures in military forces living in close quarters. Poor nutrition and the unsanitary conditions of war camps have an effect.

A third wave occures in the winter and spring of 1919, and a fourth, smaller wave occures in a few areas in spring 1920. Initial symptoms of the flu are typical: sore throat, headache, and fever. The flu often progress rapidly to cause severe pneumonia and sometimes hemorrhage in the lungs and mucus membranes. A characteristic feature of severe cases of the Spanish Flu are heliotrope cyanosis, where the patient’s face turnes blue from lack of oxygen in the cells. Death usually followes within hours or days.

Modern medicine such as vaccines, antivirals, and antibiotics for secondary infections is not available at that time, so medical personnel couldn’t do much more than try to relieve symptoms.

The flu endes when it have infects enough people that those who is susceptible has either dyed or developing immunity.

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