Of the three major vaccines in current use:
* The Pfizer vaccine was developed by BioNTech, a German company; BioNTech was the developer and Pfizer is the production and distribution muscle;
* The AstraZeneca vaccine was developed by Oxford University in the UK;
* Moderna is a US company; because of the technology they (and BioNTech) use, Moderna had their current vaccine designed within a week of learning the SARS-CoV-2 virus DNA sequence; the US government was aiding them almost literally from the start.
Whether Hillary or Joe, what would not have happened are:
* The FDA being ass-kicked into designing test protocols that combined thoroughness and URGENCY;
* Federal funding of, variously, development and testing and the FDA giving vaccines Fast-Track status (probably worth millions of $$);
* 100M-300M dose purchase contracts that came into effect when a vaccine received FDA Emergency Use Authorization.
Neither Hillary or Joe would have the sense of urgency or the imagination to try what Operation Warp Speed accomplished.