U.S.-based Georgian cardiologist Nana Gegechkori labeled Pfizer a leader among authorized vaccines in her social media post.
''Unfortunately, neither of the vaccines have so far proved to be as good as Pfizer. Pfizer has been unparalleled among approved vaccines. These vaccines are not enough to vaccinate everyone and, hopefully, other highly effective vaccines will soon emerge. However, German CureVac does not seem promising,'' the cardiologist wrote.