Table 1 Demographic and clinical characteristics of nursing home residents involved in the three post-vaccination outbreaks

From: Immunovirological and environmental screening reveals actionable risk factors for fatal COVID-19 during post-vaccination nursing home outbreaks

Characteristics

Nursing home A Delta

Nursing home B Gamma

Nursing home C Mua

Median age, years (range)

87 (63–102)

82 (59–98)

87 (64–103)

Sex, number (%)

 Male

71 (26.5%)

11 (23.9%)

77 (25.2%)

 Female

197 (73.5%)

35 (76.1%)

229 (74.8%)

Start vaccinating residents

8 Jan 2021

12 Jan 2021

26 Jan 2021

Vaccination ratio (among PCR+)

 2 doses

96% (94.6%)

86.2% (89.5%)

98.0% (100%)

 1 dose

1% (1.4%)

13.0% (10.5%)

0.4% (0%)

 0 doses

3% (4.1%)

0%

1.3% (0%)

First documented case

17 May 2021

20 May 2021

20 July 2021

 PCR positivity

62.5% (75/120)

65.5% (19/29)

12.0% (20/166) 69.0% (20/29)d

 Case fatality ratio (only PCR+)

20.0% (15/75)b

31.6% (6/19)c

35.0% (7/20)b

  1. aFor nursing home C, three isolated Delta cases were observed in addition to the Mu outbreak. All residents received the Comirnaty (Pfizer) vaccine.
  2. bAn additional resident died, not SARS-CoV-2 PCR positive, with death considered not COVID-19 related.
  3. cA total of seven fatal cases, of which one was not SARS-CoV-2 PCR positive; this death was classified as COVID-19 related due to severe respiratory symptoms and recent close contact with positive residents, according to WHO criteria16.
  4. dConsidering only the 29 residents of the two affected wards, positivity rates increase up to 69.0%.
Back to article page