As Russia fast tracks a coronavirus vaccine, scientists worry about skipped safety checks – and the potential fallout for trust in vaccines if something ends up going wrong.
Now is not the time to ease up the prevention effort, or decades of progress could be undone.
Effective health care interventions are very important for sub-Saharan Africa because the region has a high burden of vaccine-preventable diseases.
Even when cases of measles are detected in clinics, limited diagnostic and communication infrastructure can delay the response.
Angola's yellow fever outbreak has been declared a grade 2 emergency by the World Health Organisation.