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Second waves, social distancing, and the spread of COVID-19 across America [version 1; peer review: 2 approved with reservations]

Friston KJ, Parr T, Zeidman P, Razi A, Flandin G, Daunizeau J, Hulme OJ, Billig AJ, Litvak V, Price CJ, Moran RJ and Lambert C