Here are a few examples:ModernaThis week, we learned about the Moderna vaccine that is showing promise. Moderna is a young company (10 years old) and has never had a drug approved before so this would be the first. Last week, a few experts said the United States is not prepared to start supplying millions of doses of any kind of vaccine. That’s exactly what the researchers working on the trials with these vaccines want to find out. Before producing millions of doses and injecting millions of people, they want to know who is a good candidate for the drug.