A vaccine kit sent to the wrong state. A hospital system in California expecting to get powdered vaccines instead of frozen vials. And tens of thousands of people expect to get vaccinated in the coming weeks, when in reality they are going to have to wait for months. The rollout of the first coronavirus vaccine is already messy, and it has only been authorized since late Friday night. … Here are some of the problems the US public can expect to see with any mass vaccination effort: People will have to wait … Distribution may seem unfair … There will be side effects … There will be vaccine scares … There will be mistakes.