MEXICO CITY, Mexico (AFP) — Mexico said it signed an agreement Wednesday with US pharmaceutical giant Pfizer to buy 34.4 million vaccines against the coronavirus, with a first batch due to arrive this month. The Latin American nation has reported almost 107,000 Covid-19 deaths — one of the world’s highest tolls — and more than 1.1 million infections. The health ministry announced on Twitter that it expected to receive the first 250,000 doses in December. […]