Singapore’s Chiangi Airport this week began full-scale Covid-19 vaccination of airport workers, with plans to have 7,000 employees vaccinated by the end of the week.

Workers are receiving vaccinations at a facility in the airport’s Terminal 4, with priority going to the 20,000 frontline workers who come in contact with travelers, baggage and cargo. The facility can vaccinate about 2,000 people daily. Once workers receive the full course of vaccinations, their frequency of required Covid-19 testing also will decrease.

In a memo, Singapore Airlines CEO Goh Choon Phong said vaccines are voluntary for the carrier’s employees, though strongly encouraged. More than 5,200 Singapore Airlines employees have signed up for the vaccine so far, he said.

The vaccinations “will set the SIA Group up for a quicker recovery from this debilitating crisis and provide a platform for us to return to pre-Covid operations,” he said.