A virus infection that is transmitted via a tick bite. If you are planning on getting pregnant and spend time in tick-dense areas, we recommend getting vaccinated. However, this recommendation does not apply if you are already pregnant. Instead, you should take preventive measures against tick bites. There are no studies that indicate mother-to-child transmission during pregnancy or in conjunction with childbirth.
Source: - https://www.cdc.gov/vhf/tbe/