IFNAR1 and measles: Another study showed that a measles-based vaccine expressing preME (ΔStem/TM) -MV-ZIKA did not clear ZIKV from the placenta of the vaccinated animals in a low-dose Asian strain challenge in an hCD46-IFNAR−/− model but cleared the virus from the fetuses, verifying the importance of full-length preME as the immunogen55.