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Where was the 1957 flu pandemic located Or where did it start?
The "Asian Flu" was a category 2 flu pandemic outbreak of avian influenza that originated in China in early 1956 lasting until 1958. It originated from mutation in wild ducks combining with a pre-existing human strain. The virus was first identified in Guizhou. It spread to Singapore in February 1957, reached Hong Kong by April, and US by June. Death toll in the US was approximately 69,800. Estimates of worldwide deaths caused by this pandemic varies widely depending on source; ranging from 1 million to 4 million, with WHO settling on "about 2 million". Asian Flu was of the H2N2 subtype (a notation that refers to the configuration of the hemagglutinin and neuraminidase proteins in the virus) of type A influenza, and an influenza vaccine was developed in 1957 to contain its outbreak. The Asian Flu strain later evolved via antigenic shift into H3N2 which caused a milder pandemic from 1968 to 1969. Both the H2N2 and H3N2 pandemic strains contained avian influenza virus RNA segments. "While the pandemic human influenza viruses of 1957 (H2N2) and 1968 (H3N2) clearly arose through reassortment between human and avian viruses, the influenza virus causing the 'Spanish flu' in 1918 appears to be entirely derived from an avian source (Belshe 2005)."
What are the tenses of spread?
The tenses of "spread" are spread (present), spread (past), and spread (past participle).
What is the present perfect spread?
I/you/we/they have spread. He/she/it has spread.
Present tense for spread?
The present tense for spread is spread.
Past tense of the word spread?
The past tense of the word "spread" is "spread." For example, "She spread the news to everyone."
What is the past tense and past participle of spread?
The past tense of spread is spread, and the past participle is also spread.
Can be spread?
No. It can not be spread.
What is the past participle for spread?
The past participle for "spread" is "spread."
What is the past tense of spread?
The past tense is also spread.
What is the past particiole of spread?
The past participle of "spread" is "spread." For example, "I have spread the frosting on the cake."
When did the black daeth spread?
It Spread a Disease what Else would it spread
What was not spread by the Persians?
Democracy was not spread by the Persians and your welcome.
