If you are an American, you probably could not avoid noticing the news that the Pfizer and Moderna vaccines for COVID-19 have shown >90% effectiveness in preventing the disease over the short-term. And both companies would probably be seeking an Emergency Use Authorization (EUA) in the USA for use of their vaccines in groups who are most in need of protection from COVID-19.
Even though I’ve discussed the positive and negative points about the Pfizer and Moderna COVID-19 vaccines, I think it’s important to highlight the similarities and differences between the two vaccines. Also, please note that these vaccines probably will be released first in the USA, especially Moderna who received support from the Federal Government through Operation Warp Speed (Pfizer opted out of it). There are several other vaccines in phase 3 clinical trials that could be seeking a EUA sometime in the near future in the USA and Europe.
Moreover, there are over 200 COVID-19 vaccine candidates in development, with dozens in phase 1 and phase 2 clinical trials. By early 2022, we could be comparing 10 or 15 vaccines that might be entering the market.
But this article is just going to focus on the Pfizer and Moderna COVID-19 vaccines. I’m going to hit the key similarities and differences between the two vaccines. I may conclude with my opinion on which one will be successful, but we might not know for years which of all of these vaccines are the “best.”