The coronavirus has mutated into numerous different substrains, including the three so-called "variants of concern": B.1.1.7 from the U.K, B.1.351 first identified in South Africa and P.1, first found in Brazil. In this episode, Medcan's chief medical officer, Dr. Peter Nord interviews Dr. Aisha Khatib, the clinical director of travel medicine, about how the VoCs are different from the original coronavirus. Are they more or less deadly? Do the variants make a third wave inevitable? How do the vaccines protect against the variants? Our experts translate all of it for general listeners in easy-to-understand terms.