SAN FRANCISCO (KRON) — Friday morning, three Zika virus cases were confirmed in the East Bay, bringing the current total to five confirmed Zika virus cases in the Bay Area.
The first case of the Zika virus in the Bay Area was confirmed in Napa County on Wednesday, the second case was confirmed in San Francisco on Thursday afternoon.
Friday morning, Alameda County public health officials reported the county with one confirmed case, and Contra Costa County health officials reported two confirmed cases.
Alameda County and Contra Costa County are not releasing further information on the cases.
The resident of San Francisco who contracted the virus has recovered.
County healthy officials in all four counties have stated there are no threats to public health.
The San Francisco Department of Public Health received confirmation from the California Department of Public Health on February 4th, nearly one month after the case was initially confirmed.
Health department spokesperson, Rachael Kagan, said officials delayed announcing the confirmed case to the public because the case posed no public health threat.
Department officials may reconsider the policy.
The department is also working with San Francisco communities and residents who are from countries where transmission is occurring, such as, Latin America, Caribbean, and Puerto Rico.
Zika virus is typically spread by mosquitoes. Doctors have also identified cases in which transmission has occurred through sexual intercourse.
The disease generally causes mild symptoms, such as, rash, fever, joint pain, and red eyes.
The virus also appears to be linked to a birth defect, microcephaly, which causes children to be born with smaller heads, according to San Francisco health officials.
Brazil has reported an increase in cases of microcephaly.
According to San Francisco health officials, the transmission of the disease is not occurring in the U.S., but U.S. health officials are warning people, especially pregnant women, to consider delaying travel plans to countries where transmission is occurring.
Officials with the Centers of Disease Control are encouraging people who are traveling to countries where transmission is occurring to protect themselves from mosquito bites.
Bay City News contributed to this report.