Table 1.
Prevalence of RNAemic Donations by Seasonal Arbovirus Outbreak Period in 4 Blood Centers, Brazil
| Period | Fundação Pró-Sangue, São Paulo | Hemominas, Belo Horizonte | Hemope, Recife | Hemorio, Rio de Janeiro | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ZIKV | CHIKV | DENV | ZIKV | CHIKV | DENV | ZIKV | CHIKV | DENV | ZIKV | CHIKV | DENV | |
| Apr 2016–Oct 2016a | 0.0 (.0–26.8) | 7.0 (1.2–39.5) | 28.0 (10.9–71.9) | 88.3 (47.9–162.4) | 0.0 (.0–33.7) | 70.4 (35.7–138.9) | 0.0 (.0–31.8) | 83.0 (45.1–152.8) | 0.0 (.0–31.8) | 202.6 (139.1–294.9) | 111.9 (67.7–184.7) | 14.8 (4.1–53.9) |
| Nov 2016–Jun 2017a | 0.0 (.0–27.7) | 0.0 (.0–27.7) | 0.0 (.0–27.7) | 8.2 (1.4–46.2) | 0.0 (.0–31.3) | 0.0 (.0–31.3) | 0.0 (.0–29.5) | 0.0 (.0–29.5) | 0.0 (.0–29.5) | 94.9 (54.3–165.8) | 7.9 (1.4–44.7) | 0.0 (.0–30.3) |
| Nov 2017–Jun 2018 | 0.0 (.0–27.9) | 0.0 (.0–27.9) | 0.0 (.0–27.9) | 0.0 (.0–31.3) | 0.0 (.0–31.3) | 8.2 (1.4–46.2) | 0.0 (.0–27.5) | 14.4 (3.9–52.3) | 28.8 (11.2–73.9) | 65.3 (33.1–128.7) | 49.1 (22.5–107.0) | 0.0 (.0–31.2) |
| Nov 2018–Jun 2019 | 0.0 (.0–27.2) | 0.0 (.0–27.2) | 49.9 (24.2–102.9) | 0.0 (.0–28.3) | 0.0 (.0–28.3) | 358.2 (269.3–475.6) | 0.0 (.0–28.5) | 0.0 (.0–28.5) | 29.8 (11.6–76.6) | 0.0 (.0–28.6) | 45.0 (20.6–98.1) | 22.5 (7.6–65.9) |
Data are presented as RNAemic donations per 100 000 (95% confidence interval).
Abbreviations: CHIKV, chikungunya virus; DENV, dengue virus; ZIKV, Zika virus.
Testing started in April 2016 and continued for 15 consecutive months. From July 2017, the periods July–October were not tested, since there is normally limited outbreak activity during these months.