Cuba has detected the first case of the Zika virus on the island, which had been one of the last nations in the Western Hemisphere free of the disease.
The Ministry of Health said in state media that a 28-year-old Venezuelan post-doctoral student in gastroenterology arrived in the country February 21 and a day later came down a high fever and rash.
The government says the woman was under medical quarantine in Artemisa province outside Havana with other newly arrived doctors when her symptoms were detected.
An initial test for Zika was negative, but a second test on February 28 was positive, health officials said.
The woman remains hospitalised in good condition at Cuba's main tropical disease hospital in Havana, officials said.
Her husband and brother-in-law had both come down with Zika in Venezuela in recent weeks.
The medical professionals who had entered Cuba alongside the sick woman remain in quarantine with no sign of Zika, officials said.
The Health Ministry made no mention of any case of Zika transmitted inside Cuba.
President Raul Castro announced last month that the country was militarising its fight to kill disease-carrying mosquitoes, assigning 9000 soldiers to spray for the insects nationwide.
Since then, soldiers, police and health workers have launched an intense door-to-door effort to fumigate for mosquitoes.
