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. 2023 Aug 8;19(2):2239088. doi: 10.1080/21645515.2023.2239088

Table 5.

Adverse events of special interest.

  Total BCG (Stage 1 & 2)
n = 3379
BCG (Stage 1)
n = 1387
BCG (Stage 2)
n = 1992
Placebo
n = 1972
Injection site abscess 55 (1.6%) 41 (3.0%) 14 (0.7%) 0 (0.0%)
Large ulcer (>1.5 cm) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
Keloid scar 2 (0.06%) 0 (0.0%) 2 (0.1%) 0 (0.0%)
Unusual local reaction* 4 (0.1%) 4 (0.3%) 0 (0.0%) 1 (0.05%)
Regional lymphadenopathy (axillary/neck) 101 (3.0%) 48 (3.5%) 53 (2.7%) 9 (0.5%)
Allergic reaction due to BCG** 1 (0.03%) 0 (0.0%) 1 (0.05%)
Vasovagal episode following vaccination 3 (0.1%) 2 (0.1%) 1 (0.05%) 0 (0.0%)
BCG osteitis/osteomyelitis 0 (0.0%) 0 (0.0%) 0 (0.0%)
Disseminated BCG infection (BCG-osis) 0 (0.0%) 0 (0.0%) 0 (0.0%)

*BCG: 2 participants had a persistent firm swelling at the BCG site, without meeting abscess criteria; one surgically removed by local medical practitioner with local anaesthetic four months post vaccination, and the other (onset day 35 following vaccination, size 3 cm diameter) self-resolved after three months. One participant had a painful shoulder with restricted movement (onset day 51 following vaccination) self-resolving within one week. One participant had a diagnosis of disseminated granuloma annulare, commencing two months following vaccination, with a single buttock lesion.

*Placebo: 1 participant with intermittent tingling from left shoulder to elbow (onset day 30 following vaccination) self-resolving after 2–3 weeks.

**Participant with localized urticaria in left arm progressing to generalized pruritis, onset day 1, treated with antihistamines, resolved within one week.

All occurred following blood sampling and receiving vaccination in patients with history of needle-associated vasovagal episodes.