My employer has achieved a 98% vaccination rate for flight crew since February, it’s not compulsory and it was stated that it wouldn’t affect your roster BUT the company would have to comply with local and foreign regulations. Unvaccinated crew are already subjected to more frequent swab tests and as flying increases I fully expect certain countries to bar entry or even prohibit them to operate turn around flights, especially given that Taiwan’s recent outbreak was traced to China Airlines pilots.
So far, no adverse reactions beyond mild fever and no COVID infections either.