3 in 15,000 is actually about what you'd expect. I'm not sure the proposed mechanism of that, bells Palsy is caused by viruses, when you get a vaccine your body goes into a stressed state and those viruses can reactivate and cause it, that would be my best guess. If the vaccine directly causes it that would be very interesting and if I got it then I ld just wear a plague doctor mask, would be a good excuse haha was worn by doctors in the bubonic plague