DHAKA, Bangladesh — Bangladesh has reported 11,525 positive cases, the highest in a day since the start of the coronavirus pandemic.

Another 163 people died in the last 24 hours, raising the total number to 15,392, according to the government. Bangladesh’s cases of new infections increased last month when the delta variant — first discovered in India — hit the country’s border regions in the northern and southwestern Bangladesh.

Bangladesh shares a large border with India and health experts say the actual number of both infections and deaths is likely higher. The country is facing a crisis in vaccination after India stopped exports of AstraZeneca shots because of its own outbreak in April. Bangladesh has a deal to get 30 million doses from India’s Serum Institute.

Only 4 million Bangladeshis have been vaccinated in a country of 160 million people. Authorities are hoping to start a new mass vaccination campaign with China’s Sinopharm and other vaccines.