In addition to the previous points, you might have noticed that the virus is evolving through mutations. I've heard the news mention a British mutation, a Brazilian mutation and a South African mutation. If it would turn out that the one formula was highly inefficient against one or more of the mutations then we would be back on square one with a widespread disease without an effective vaccine. As it is now, there are multiple options so hopefully all the mutations will have some vaccine that is effective against it.Is there any actual reason (besides capitalism I mean) to not just use the same formula or whatever for all vaccines? Something like an open source vaccine I guess.