Sinovac says its COVID-19 vaccine more effective with longer dosing interval - Yahoo News
- Sinovac says its COVID-19 vaccine more effective with longer dosing interval Yahoo News
- Confidence in Chinese vaccines has taken a hit. But as coronavirus cases grow, some countries are still pushing ahead CNN
- Covid: Brazil approves and rolls out AstraZeneca and Sinovac vaccines BBC News
- Bolsonaro rival hails Covid vaccinations as 'triumph of science against denialists' The Guardian
- Brazil authorizes two Covid-19 vaccines for emergency use CNN
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