Table 3. Risk assessment of SFTS human-to-human transmission in China and South Korea, 1996–2019.
| No. | Reference No. | Secondary cases (No.) | Time of exposure since illness onset of index cases min, max (day) | Incubation period min, max, median (day) | Secondary attack rate (Secondary case/Exposure population) | R0 |
|---|---|---|---|---|---|---|
| 1 | [20] | 10 | *, *(n = 0) | *, *, *(n = 0) | 23.81% (10/42) | 5.0 |
| 2 | [11] | 3 | 6, 6(n = 3) | 7, 9, 7.0(n = 3) | 33.33% (3/9) | 3.0 |
| 3 | [11] | 9 | 5, 5(n = 9) | 6, 14, 8.0(n = 9) | 23.08% (9/39) | 9.0 |
| 4 | [9,24] | 6 | 9, 10(n = 6) | 7, 12, 9.0(n = 6) | 6.59% (6/91) | 6.0 |
| 5 | [10,14,26] | 4 | 11, 11(n = 4) | 8, 10, 9.0(n = 4) | 12.90% (4/31) | 4.0 |
| 6 | [10] | 5 | *, *(n = 0) | 7, 15, *(n = 0) | 7.94% (5/63) | 5.0 |
| 7 | [12,42] | 2 | 12, 12(n = 1) | 10, 10, 10.0(n = 1) | 22.2% (2/9) | 2.0 |
| 8 | [27–29,31] | 4 | 5,5(n = 4) | 4, 8,7.5(n = 4) | 50.00% (4/8) | 4.0 |
| 9 | [13,34] | 3 | *, *(n = 0) | 7, 12, *(n = 0) | 4.92% (3/61) | 3.0 |
| 10 | [15,30,43] | 2 | 12, 12(n = 1) | 12, 12, 12.0(n = 1) | 33.33% (2/6) | 2.0 |
| 11 | [35] | 2 | 2, 2(n = 1) | 7, 7, 7.0(n = 1) | 25.00% (2/8) | 2.0 |
| 12 | [16,36] | 8 | 12, 12(n = 8) | 7, 13, 9.0(n = 8) | 20.00% (8/40) | 8.0 |
| 13 | [32,44] | 4 | 7, 8(n = 2) | 11, 12, 11.5(n = 2) | 13.33% (4/30) | 4.0 |
| 14 | [17,33,37] | 11 | 10, 10(n = 11) | 10, 15, 12.0(n = 11) | 55.00% (11/20) | 11.0 |
| 15 | [18,38] | 5 | 9, 9(n = 2) | 8, 9, 8.5(n = 2) | * | 2.0 |
| 16 | [39] | 3 | 3, 8(n = 30) | 8, 12, 11.0(n = 3) | 33.33% (3/9) | 3.0 |
| 17 | [40] | 2 | 5, 6(n = 2) | 12, 14, 13.0(n = 2) | 33.33% (2/6) | 2.0 |
| 18 | [23,41] | 3 | 5, 10(n = 3) | 9, 14, 9.0(n = 3) | 21.43% (3/14) | 3.0 |
| 19 | [19,46,48] | 2 | 8, 8(n = 2) | 8, 12, 10.0(n = 2) | 6.25% (2/32) | 2.0 |
| 20 | JS1 | 6 | 8, 8(n = 6) | 4,14,8.0(n = 6) | 31.60% (6/17) | 6.0 |
| 21 | [45] | 3 | 4, 4(n = 1) | 10, 10, 10.0(n = 1) | 8.82% (3/35) | 3.0 |
| 22 | [21] | 1 | 9,9(n = 1) | 12,12,12.0(n = 1) | 7.10% (1/14) | 1.0 |
| 23 | [22] | 5 | 5,5(n = 5) | 8,11,9.0(n = 5) | 20.0% (5/25) | 5.0 |
| 24 | [47] | 1 | 9,9(n = 1) | 3,3,3.0(n = 1) | * | 1.0 |
| 25 | JS2 | 1 | 18,18(n = 1) | 14,14,14.0(n = 1) | 1.72% (1/58) | 1.0 |
| 26 | JS3 | 4 | 13,16(n = 4) | 9,12,10.0(n = 4) | 8.89% (4/45) | 4.0 |
| 27 | JS4 | 2 | 5,6(n = 2) | 10,11,10.5(n = 2) | 4.65% (2/43) | 2.0 |
| Total | N/A | 111 | 2, 18(n = 80) | 3, 15, 10.0(n = 84) | 1.72%, 55.00% | N/A |
Note: n is the total number of cases for whose information is available
* is missing from publications