LAUSR

To the Editor: Mean (SD), y 57.1 (19.2) <50 y, n (%) 10 (33.3) 50–79 y, n (%) 17 (56.7) ≥80 y, n (%) 3 (10.0) Male, n (%) 12 (40.0) Race, n (%) Chinese 23 (76.7) Malay 7 (23.3) Vaccination status, n (%) Fully vaccinated 24 (80) Partially vaccinated 1 (3.3) Unvaccinated 5 (16.7) Immunocompromised, n (%) Solid organ transplant 14 (46.7) Bone marrow transplant 2 (6.7) Cancer on chemotherapy 6 (20.0) Noncancer immunosuppression 2 (6.7) None 6 (20.0) Day of illness administered, n (%) 2 4 (13.3) 3 11 (36.7) 4 11 (36.7) 5 4 (13.3) ISARIC score, n (%) 0–3 12 (40.0) 4–8 16 (53.3) 9–14 2 (6.7) Anti-S, n (%) Unknown at the time of administration 7 (23.3) <100 U/mL 20 (66.7) 101–200 U/mL 3 (10.0) Reaction None 25 (8.3) Mild 5 (16.6) Severe 0 (0) Escalation to hospital, n (%) 1 (3.3)