“…Beni, Pando, and Santa Cruz share important border crossings with the Brazilian border states of Acre, Rondonia, Mato Grosso, and Mato Grosso do Sul. Acre, Mato Grosso, and Mato Grosso do Sul had the lowest restrictions of Brazil's states, which were already much lower on average than any department in Bolivia (Knaul et al 2022;Touchton et al 2021). While border closures helped to insulate Bolivia, shared borders with lax Brazilian states may have increased transmission in Beni, Pando, and Santa Cruz, especially the transmission of more contagious variants.…”