CHICAGO Studies using gene sequencing equipment to trace the path of Zika through the Americas show the virus arrived a year before the first case was detected in Brazil, and several months before it was first reported in Florida.
Video: What is Zika?
LONDON Scientists in Britain plan to harness the Zika virus to try to kill brain tumor cells in experiments that they say could lead to new ways to fight an aggressive type of cancer.
HAVANA Cuba said on Thursday 1,847 residents had so far contracted the mosquito-borne Zika virus, warning that certain provinces on the Caribbean island still had high rates of infestation despite a series of measures to stave off the epidemic.
Austrian biotech company Themis Bioscience said on Tuesday it had started a clinical trial of an experimental Zika vaccine in healthy volunteers, opening up another front in the race to prevent the spread of the mosquito-borne disease.
CHICAGO Texas health officials are expanding testing recommendations for pregnant women in South Texas as the advent of warm weather increases the risk for local transmission of the mosquito-borne virus that has been shown to cause severe birth defects.
TEPIC, Mexico (Thomson Reuters Foundation) - The ripple effects of the Zika virus are hitting the poor hard in Latin America and the Caribbean, and could knock back development unless states involve communities in a stronger push to tackle the disease, a U.N.-led study said on Thursday.
CHICAGO About one in 10 pregnant women with confirmed Zika infections had a fetus or baby with birth defects, offering the clearest picture yet of the risk of Zika infection during pregnancy, U.S. researchers said on Tuesday.
CHICAGO Researchers have begun the second phase of testing of a Zika vaccine developed by U.S. government scientists in a trial that could yield preliminary results as early as the end of 2017.
The U.S. National Institute of Allergy and Infectious Diseases (NIAID) said on Friday that vaccinations have begun in a mid-stage trial testing an experimental DNA vaccine for Zika.
CHICAGO Prior infection with West Nile or dengue - two viruses closely related to Zika - can make Zika symptoms worse, U.S. researchers said on Thursday.
SINGAPORE Singapore has confirmed two cases of locally transmitted infections of the Zika virus in a northeastern part of the city state, the National Environment Agency said on Wednesday, describing it as the first Zika cluster of 2017.
Local transmission of the Zika virus in Florida may have occurred as early as June 15 of last year and likely infected people who lived not only in Miami-Dade County, but in two nearby counties, U.S. health officials said on Monday.
(In sixth paragraph of Feb. 16 story, yellow fever replaces Chikungunya as an example of a flavivirus. Chikungunya is an alphavirus)
CAMPINA GRANDE, BRAZIL The doctor who first linked the Zika virus to birth defects says Brazil has too quickly forgotten the tragedy of 2,000 babies born with smaller-than-normal heads and runs the risk of a second wave of infections if the virus mutates.
MEXICO CITY Mexico has confirmed the first case of microcephaly linked to the Zika virus, the health ministry said on Friday.
GENEVA Brazil and Latin America are recording lower numbers of Zika infections than last year, but all countries must remain vigilant against the virus which can cause birth defects, the World Health Organization (WHO) said on Wednesday.
LUANDA Angola said on Wednesday it had recorded its first two cases of the Zika virus, just three months after a yellow fever epidemic that killed at least 400 people was brought under control.
CHICAGO A year ago, the mosquito-borne Zika virus was only beginning to reveal itself as a threat to pregnant women and their unborn babies.
LONDON Brazil should urgently review its reproductive health policies, scientists said on Friday, to support the more than 50 percent of potential mothers who say they want to avoid pregnancy due to fears about the Zika virus.
Inovio Pharmaceuticals Inc said its experimental Zika vaccine induced robust immune responses in an early-stage study in human volunteers who have not been infected with the virus.