Not an expert, but I think the problem is in the testing and distribution. Just from a public health POV, it's hard enough tracking who is getting doses of what

Not an expert, but I think the problem is in the testing and distribution. Just from a public health POV, it's hard enough tracking who is getting doses of what and all the public communication about what to do that it really needs and deal with hate tweets from Rand Paul. Synthesizing the vaccine could possibly be done in a week.