Shanghai authorities hold a press conference on Saturday morning to brief the public on the city's two new local COVID-19 cases. Here's what we know so far: 

- The two patients are a couple in their 30s. The male is a security staffer at the Pudong International Airport while his wife is a care worker at Pudong Hospital.

- All places and venues that the two had been to over the past 14 days have been put under closed-off management.

- Outpatient appointments at Pudong Hospital are halted, and 4,015 patients and medical staff at the hospital have been tested; over 3,200 results that came out so far are negative.

- The school the couple's daughter attends has shifted all in-person classes to online courses.

- The COVID-19 alert in the residential compound where they live has been raised to medium level and residents are advised not to leave Shanghai.

- Eighty-six close contacts of the two, including six family members, were isolated for medical observation. Their first round of virus testing came back negative.

- Zhang Wenhong, head of Shanghai's COVID-19 clinical expert team, believes the two new cases are not linked to a previous case which was diagnosed on November 9 involving a male porter working at the Pudong airport.