The race for a COVID-19 vaccine is in full swing. Russian President Putin says a fast-tracked vaccine is ready for widespread use. Trump says he's "optimistic" that a vaccine will be ready around Election Day. And China has approved a vaccine for military use. But will the high speed vaccine development process lead to a safe vaccine? Besides, there probably won’t be enough vaccine for everyone to start with. Who will get the vaccines first? Will countries only look after their own interests?