Among the cases was a 36-year-old male patient who lives at Block 5, Rambler Crest, Tsing Yi.

He traveled to South Africa on October 23 and returned to Hong Kong on November 11 by flight QR818. He tested negative upon arrival, but tested positive during quarantine at Regal Airport Hotel, Chek Lap Kok and carries the N501Y mutant strain.

As a prudent measure, his residence has been included in a compulsory testing notice.

All of the six patients are men, aged 17 to 68 years. Five of them arrived in Hong Kong from Group A (high-risk) countries, including South Africa, Turkey, the Philippines and Pakistan. One came from Germany, a Group B (medium-risk) place.

Two patients tested positive during quarantine and the remaining tested positive upon arrival at Hong Kong International Airport.

Five of the cases involved mutant strains while the mutation test result of the remaining case is pending.

Separately, the Centre for Health Protection continues to follow up on the three Cathay cargo pilots who carry the L452R mutant strain.

It was found that two of them arrived in Frankfurt in Germany on November 1 and checked into the same hotel – Hyatt Regency Mainz – as arranged by Cathay Pacific Airways.

Both of them claimed that they did not leave their rooms during their stay in the hotel and did not participate in any gatherings.

The remaining case arrived in Frankfurt on November 3 and also stayed in that hotel. He did not have contact with the other two pilots.

Epidemiological investigations showed a cluster outbreak may have occurred at the hotel. The center has immediately informed the health authority of Germany to follow up on the situation.