Mexico's health ministry said it had received nearly six million AstraZeneca vaccine doses against Covid-19 as pressure grows on the government to widen its vaccination roll-out to include children.

The shipment of 5,993,700 doses followed the arrival of almost 6.5 million Sputnik V vaccine doses on Tuesday, easily the two biggest vaccine consignments Mexico has received, according to data on the ministry's website.

Mexico has fully vaccinated around 56 million people, or over 43 per cent of the population, according to Our World in Data, a research group at Oxford University.

The government has yet to undertake a broad inoculation programme for children, saying only that it would vaccinate up to a million aged between 12 and 17 deemed to be at high risk.