Pakistan's President Arif Alvi has tested positive for COVID-19, he has said on Twitter, after receiving his first dose of a vaccine.
"Had (first) dose of vaccine, but antibodies start developing after (second) dose that was due in a week. Please continue to be careful," he said.
Coronavirus cases are rising quickly in the country and Prime Minister Imran Khan tested positive two days after receiving his first vaccine dose earlier this month with officials saying he had likely been infected before being vaccinated.
Meanwhile, Defence Minister Pervez Khattak was also diagnosed with the virus.
Earlier on Monday, Pakistan put virus hotspots in more than two dozen cities with higher infection rate under lockdown and started the process of vaccinating people aged 50 and above.
At least 4525 new infections and 41 virus-related deaths were reported by the health ministry.