Gerrard seems to be taking quick steps to prevent his players from being exposed to COVID-19, he will consider seeing the vaccine status of the target players. Maybe other coaches need to follow this way, so players don't underestimate the vaccine (if there are still football players who haven't been vaccinated)
It's usual that he anticipates all his players to be vaccinated because the impact is so fatal to his strategy that it's better to prevent than have a bad impact in the future. Aston villa are also not in a very attractive position, they are only able to be in the middle of the standings at the moment. Their target is definitely higher than the previous year's achievement, which is at the end of the 11th position.