Pfizer and Moderna have been popping up on the news lately about their vaccines development progress.
On November 9, Pfizer released a media statement that their vaccine candidate was found to be more than 90% effective in preventing Coronavirus in participants. It was the first interim efficacy analysis and the participants involved had no history of prior COVID-19 infection.
The study enrolled over 43,500 participants and no serious safety concerns have been reported. Pfizer admitted, however, that the main challenge to their vaccine candidate is the ultra-low temperature formulation and storage.
Moderna crashed Pfizer's party, on November 16, by announcing that their vaccine candidate has higher efficacy than Pfizer's - 94.5%. More than 30,000 participants were enrolled in the study.
The vaccine is being developed in collaboration with the National Institute of Allergy (NIAID) and Infectious Diseases and Biomedical Advanced Research and Development Authority (BARDA).
2 days later, Pfizer announced that they have concluded their vaccine candidate study and met all primary efficacy endpoints. The reported efficacy is over 94% (in adults over 65 years old).
The company has also updated the storage and transport of its vaccine;
"The companies have developed specially designed, temperature-controlled thermal shippers utilizing dry ice to maintain temperature conditions of -70°C±10°C. They can be used be as temporary storage units for 15 days by refilling with dry ice."
Although these are really great news, Twitter users did not fail and came up with some really interesting memes on this little Pfizer-Moderna vaccine feud.
Ladies: Prior to tonight, you were asked to prepare a vaccine for coronavirus.— Joey Nolfi (@joeynolfi) November 18, 2020
Moderna, Pfizer, the time has come. Good luck, and don’t fuck it up. pic.twitter.com/X3qhHfXVWb
Behind-the-scenes view of the Pfizer and Moderna comms teams preparing press releases this week... pic.twitter.com/bRITYJSWVo— KizzyPhD (@KizzyPhD) November 18, 2020
Oh, the drama!
Pfizer and Moderna competing for the most effective Covid Vaccine. pic.twitter.com/wqD3Mrqj2B— s n a △⃒⃘ (@mrSNASAN) November 18, 2020
Pfizer, when they learned that the Moderna vaccine is slightly more effective and doesn’t require a -80 cold chain pic.twitter.com/LteO41OzUb— Ilan Schwartz MD PhD (@GermHunterMD) November 17, 2020
Cover photo via Reuters and Moderna