Brazilians are not showing up for their second COVID vaccination

Brazil’s COVID-19 vaccination programme is being put at risk by people failing to show up for their second shot, with 1.5 million people missing appointments for the follow-up dose needed to maximise protection, according to the Health Ministry. Specialists say that is particularly concerning after a recent real-world study from Chile found that the Sinovac Biotech COVID-19 vaccine, which has accounted for some 80 percent of Brazil’s program, is just 16 percent effective after one shot.