Zika virus has almost become epidemic in various parts of the world.
The study conducted by US health official will prove the point.
US health officials said that they are monitoring 279 pregnant women in the United States and Puerto Rico suffering from Zika. Out of which, 157 live in the 50 US states and Washington, while the other 122 live in Puerto Rico. The areas are claimed to be affected by Zika virus.
Zika virus is behind a surge in cases of the birth defect microcephaly -- babies born with abnormally small heads and brains -- after their mothers were infected with the virus.
In Brazil, 1,271 babies have been born with unusually small heads and deformed brains since the outbreak of Zika began there last year.
The virus, which usually causes only mild, flu-like symptoms but can cause the rare but serious neurological disorder Guillain-Barre Syndrome, is mainly spread by two species of Aedes mosquito but has also been shown to transmit through sexual contact.
The CDC did not release the number of cases of sexually transmitted Zika, saying it cannot definitively separate those cases from mosquito-infection cases.
At least five women contracted Zika without leaving the continental US, but had sexual relations with someone who had, said the officials.
So to on the safer side, The CDC is now using two separate registries to track pregnant women residing in the United States and all territories, as Puerto Rico is keeping separate records.
But taking preventions and detecting the virus due to symptoms is not it because scientists have cases where children are born with small heads without their mother showing any symptoms of the virus.
Unfortunately, there are around 6 cases of microcephaly in every 10,000 births in US. And the worst part is yet to come because there is no vaccine for the Zika virus.