By THÉRÈSE MARGOLIS Vaccine Chaos The covid-19 vaccine rollout in Mexico, which began in December of last year, has been chaotic, to say the least, with allegations of empty syringes, vaccine hoarding, preferential administration for government workers and political maneuvering. Currently, the government is dishing up a hodgepodge of both one-dose and two-dose vaccines (some internationally verified, some not) from