“The tasks that lie ahead — manufacturing vaccines at scale, distributing them via a cold or even ultracold chain, and persuading wary Americans to take them — are not trivial, but they are all within the realm of human knowledge. The most tenuous moment is over: The scientific uncertainty at the heart of Covid-19 vaccines is resolved. Vaccines work. And for that, we can breathe a collective sigh of relief.”

—Sarah Zhang, The End of the Pandemic Is Now in Sight (The Atlantic)