By MARK LORENZANA The Covid-19 Vaccines Global Access (COVAX) will send 10 million Pfizer doses for children to Mexico, after President Andrés Manuel López Obrador (AMLO) threatened to file a lawsuit against the United Nations-backed alliance, which owes the country $75 million worth of vaccines. According to Mexican Undersecretary of Public Health Hugo López-Gatell, speaking at López Obrador’s daily press