The Food and Drug Administration approved a potentially revolutionary flu vaccine yesterday, and the push alerts came rolling in. For more than 70 years, most annual flu vaccines have come from a manufacturing process that incubates the virus in chicken eggs. As a result, seasonal flu shots can be less protective against unforeseen strains. This new vaccine, which is called mFlusiva and comes from the pharmaceutical company Moderna, is the first seasonal flu shot that uses mRNA. AdvertisementAdvertisementAdvertisementAdvertisementI was going to say: It seemed a little out of character for the Trump administration to sign off on this.