U.S. President Barack Obama has called for immediate development of tests, vaccines and treatments for the Zika virus. The Zika virus has infected people in more than 20 countries. Just this week, the U.S. Centers for Disease Control (CDC) confirmed that two people have tested positive for the virus in the states of Arkansas and Virginia. Health officials said that both became infected recently after traveling to countries where Zika virus transmission is ongoing. Health official also reported that a baby recently born in Hawaii was infected with the virus in the mother’s womb. The mother had emigrated from Brazil early in her pregnancy. In Puerto Rico, health officials are reporting 18 cases of the virus, according to Reuters. The virus was first reported in the U.S. territory last December. In Europe, a hospital said a Danish tourist who had traveled to South and Central America has tested positive for Zika virus. This came after British health officials confirmed five cases of returning travelers infected with the virus.