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    Timeline: Zika’s origin and global spread
    July 18, 2016

    The following timeline charts the origin and spread of the Zika virus
    from its discovery nearly 70 years ago:

    1947: Scientists researching yellow fever in Uganda’s Zika Forest
    identify the virus in a rhesus monkey

    1948: Virus recovered from Aedes africanus mosquito in Zika Forest

    1952: First human cases detected in Uganda and Tanzania

    1954: Virus found in Nigeria

    1960s-80s: Zika detected in mosquitoes and monkeys across equatorial Africa

    1969–83: Zika found in equatorial Asia, including India, Indonesia,
    Malaysia and Pakistan

    2007: Zika spreads from Africa and Asia, first large outbreak on Pacific
    island of Yap

    2012: Researchers identify two distinct lineages of the virus, African
    and Asian

    2013–14: Zika outbreaks in French Polynesia, Easter Island, the Cook
    Islands and New Caledonia. Retrospective analysis shows possible link to
    birth defects and severe neurological complications in babies in French
    Polynesia

    March 2, 2015: Brazil reports illness characterized by skin rash in
    northeastern states

    July 17: Brazil reports detection of neurological disorders in newborns
    associated with history of infection

    Oct. 5: Cape Verde has cases of illness with skin rash

    Oct. 22: Colombia confirms cases of Zika

    Oct. 30: Brazil reports increase in microcephaly, abnormally small
    heads, among newborns

    Nov. 11: Brazil declares public health emergency

    November 2015-January 2016: Cases reported in Suriname, Panama, El
    Salvador, Mexico, Guatemala, Paraguay, Venezuela, French Guiana,
    Martinique, Puerto Rico, Guyana, Ecuador, Barbados, Bolivia, Dominican
    Republic, Nicaragua, Curacao, Jamaica

    Feb. 1: World Health Organization (WHO) declares public health emergency
    of international concern

    Feb. 2: First case of Zika transmission in United States; local health
    officials say likely contracted through sex, not mosquito bite

    Feb. 5: U.S. Centers for Disease Control and Prevention says virus being
    actively transmitted in 30 countries, mostly in the Americas

    Feb. 8: U.S. President Barack Obama requests $1.8 billion to fight Zika

    Feb. 12: Brazil investigating potential link between Zika infections and
    4,314 suspected cases of microcephaly. Of those, 462 confirmed as
    microcephaly and 41 determined to be linked to virus

    Feb. 17: Brazil investigating potential link between Zika and 4,443
    suspected cases of microcephaly. Of those, 508 confirmed as microcephaly
    and most of those cases are linked to the virus. WHO seeks $56 million
    to fight Zika.

    Feb. 18: CDC adds Aruba and Bonaire to countries and territories with
    active outbreaks, bringing total to 32.

    Feb. 23: CDC investigating 14 cases of possible sexual transmission of
    Zika. CDC also adds Trinidad and Tobago and Marshall Islands to
    countries and territories with active outbreaks, bringing total to 34.

    Feb. 25: Brazil says confirmed microcephaly cases number more than 580
    and considers most of them to be related to Zika infections in the
    mothers. Brazil is investigating an additional 4,100 suspected cases of
    microcephaly.

    Feb. 27: France detects first sexually transmitted case of Zika.

    Feb. 29: CDC adds St. Maarten, and Saint Vincent and the Grenadines to
    countries and territories with active outbreaks, bringing total to 36.

    March 1: Brazil says confirmed microcephaly cases rose to 641 and
    considers most of them to be related to Zika infections in the mothers.
    Brazil is investigating an additional 4,222 suspected cases of microcephaly.

    March 8: WHO advises pregnant women to avoid areas with Zika outbreak
    and said sexual transmission of the virus is “relatively common.”

    March 9: CDC adds New Caledonia to countries and territories with active
    outbreaks, bringing total to 37.

    March 15: Cuba reports first case of Zika contracted in the country.

    March 16: Cape Verde identifies first case of microcephaly.

    March 18: CDC says during Jan. 1, 2015 to Feb. 26, 2016, 116 residents
    of the United States had evidence of recent Zika virus infection based
    on laboratory testing.

    Brazil says confirmed microcephaly cases rose to 863 and considers most
    of them to be related to Zika infections in the mothers. Brazil is
    investigating an additional 4,268 suspected cases of microcephaly.

    March 19: CDC adds Cuba to countries and territories with active
    outbreaks, bringing total to 38.

    March 21: South Korea confirms first case of Zika.

    March 22: CDC adds Dominica to countries and territories with active
    outbreaks, bringing total to 39. Bangladesh confirms first case of Zika
    virus.

    Brazil says confirmed microcephaly cases rose to 907 and considers most
    of them to be related to Zika infections in the mothers. Brazil is
    investigating an additional 4,293 suspected cases of microcephaly.

    March 29: Brazil says confirmed microcephaly cases rose to 944 and
    considers most of them to be related to Zika infections in the mothers.
    Brazil said the number of suspected cases of microcephaly dropped
    slightly to 4,291.

    March 31: According to the World Health Organization, there is a strong
    scientific consensus that Zika can cause the birth defect microcephaly
    as well as Guillain-Barre syndrome, a rare neurological disorder that
    can result in paralysis, though conclusive proof may take months or years.

    April 1: CDC adds Kosrae, Federated States of Micronesia to countries
    and territories with active outbreaks, bringing total to 40.

    April 4: CDC adds Fiji to countries and territories with active
    outbreaks, bringing total to 41.

    April 5: Vietnam reports first Zika infections.

    April 6: Brazil says confirmed microcephaly cases rose to 1,046 and
    considers most of them to be related to Zika infections in the mothers.
    The number of suspected cases of microcephaly dropped to 4,046.

    April 7: St. Lucia confirms first two cases of Zika, contracted locally.

    April 12: Brazil says confirmed microcephaly cases rose to 1,113 and
    considers most of them to be related to Zika infections in the mothers.
    The number of suspected cases of microcephaly dropped to 3,836. It was
    the second week in a row that the overall total figure fell.

    April 13: The U.S. Centers for Disease Control and Prevention concluded
    that infection with the Zika virus in pregnant women is a cause of the
    birth defect microcephaly and other severe brain abnormalities in
    babies. The CDC said now that the causal relationship has been
    established, several important questions must still be answered with
    studies that could take years.

    CDC adds St. Lucia to countries and territories with active outbreaks,
    bringing total to 42.

    April 14: Colombia confirms two microcephaly cases linked to Zika.

    April 18: Peru reports first case of sexually transmitted Zika virus.

    CDC adds Belize to countries and territories with active outbreaks,
    bringing total to 43.

    April 19: Chilean authorities find Zika mosquito for first time in decades.

    April 25: Canada confirms first sexually transmitted Zika case.

    April 26: Brazil says the number of confirmed cases of microcephaly
    climbed to 1,198 from 1,168 in the week through April 23, but suspected
    ones under investigation continued to decline to 3,710 from 3,741 a week
    ago.

    Brazil registered 91,387 likely cases of the Zika virus from February
    until April 2, the health ministry said, in its first national report on
    the epidemic.

    April 29: Puerto Rico reports first death related to Zika, according to
    the CDC. The country also confirmed 683 Zika cases, including 65
    pregnant women, and five suspected cases of Guillain-Barre syndrome from
    Zika, the CDC reported.

    May 4: Panama confirms four microcephaly cases tied to Zika.

    May 6: Spain gets first case of Zika-related brain defect in a fetus.

    May 9: CDC adds Papua New Guinea, Saint Barthelemy and Peru to countries
    and territories with active outbreaks, bringing total to 46.

    Honduras suspects first case of microcephaly in Zika patient.

    May 11: Brazil says the number of confirmed cases of microcephaly
    dropped to 1,326 in the week through May 7 as doctors and Brazilian
    health officials find that some suspected cases of microcephaly are not
    the disorder. Suspected ones under investigation continued to decline to
    3,433.

    May 12: CDC adds Grenada to countries and territories with active
    outbreaks, bringing total to 47.

    May 13: Puerto Rico reports first case of Zika-related microcephaly.

    May 20: WHO says an outbreak of Zika virus on the African island chain
    of Cape Verde is of the same strain as the one blamed for birth
    abnormalities in Brazil.

    May 24: Brazil reports the number of confirmed cases of microcephaly at
    1,434 for the latest week to May 21. Suspected ones under investigation
    declined to 3,257.

    May 26: CDC adds Argentina to countries and territories with active
    outbreaks, bringing total to 48.

    June 9: WHO issues updated guidelines on prevention of sexual
    transmission of the Zika virus, including advising women living in areas
    where the virus is being transmitted to delay getting pregnant.

    June 14: El Salvador confirms first case of microcephaly linked to Zika.

    June 23: CDC reports seven babies in the United States with microcephaly
    or other Zika-related birth defects such as serious brain abnormalities,
    and five lost pregnancies from either miscarriage, stillbirth or
    termination.

    June 28: First baby with Zika-related birth defect microcephaly born in
    Florida.

    June 30: CDC adds Anguilla to countries and territories with active
    outbreaks, bringing total to 49.

    Guinea-Bissau confirms three cases of Zika, government says.

    Spain records first case of sexually transmitted Zika virus, health
    authorities said.

    July 8: The Centers for Disease Control and Prevention confirmed that a
    Utah resident’s death last month is the first Zika-related death in the
    continental United States.

    July 14: CDC adds Saint Eustatius to countries and territories with
    active outbreaks, bringing total to 50.

    July 18: The Centers for Disease Control and Prevention reports that
    caregiver of Utah man who died of Zika tested positive for virus.

    SOURCES: World Health Organization, U.S. Centers for Disease Control and
    Prevention, Reuters

    (Reporting by Ben Hirschler; Editing by the Americas Desk)

    Source: Timeline: Zika’s origin and global spread –
    www.yahoo.com/news/timeline-zikas-origin-global-spread-184157674–business.html?ref=gs

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