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https://softwaregestiontransportetms.com/2020/11/15/la-distribucion-mundial-de-la-vacuna-de-pfizer-contra-covid-19-un-reto-logistico-sin-precedentes-a-80oc/
La distribución mundial de la vacuna de Pfizer contra COVID-19, un reto logístico sin precedentes a - 80ºC