BEIJING — Chinese officials say 11 more people have been diagnosed with COVID-19 in a southwestern city bordering Myanmar that is the scene of China’s current sole active outbreak.

Cases in the Yunnan province city of Ruili have topped 100, including those not showing symptoms.

However, large-scale transmission appears to have been curbed by a campaign to vaccinate all 300,000 residents of the city. People there have been told to stay home and 45 residential compounds are under complete lockdown.

China has virtually stamped out new local cases across the country through aggressive lockdowns, mask wearing, electronic monitoring and other measures. With most economic and social activity resuming, those measures are being gradually reduced, although mask wearing indoors and on public transport remains almost universal.