Table 1.
Blood samples used for virus isolation and neutralization tests
| Year | Collection date | No. of blood samples | Blood collection sites (No. of blood samples by collection site: virus isolation/VNTs) |
|---|---|---|---|
| Virus isolation/VNTsb | |||
| 1994 | 21.October – 7.November | 58/0 | Ishigaki (10/0), Taketomi (10/0), Kohama (10/0), Hateruma (10/0), Kuroshima (8/0), Yonaguni (10/0) |
| 1995 | 7 – 17.November | 50/49 | Ishigaki (40/39), Yonaguni (10/10) |
| 1996 | 17 – 28.October | 50/30 | Ishigaki (25/25), Iriomote (15/5), Yonaguni (10/0) |
| 1997 | 22–31.October | 60/49 | Ishigaki (35/30), Iriomote (15/9), Yonaguni (10/10) |
| 1998 | 10–11.November | 50/39 | Ishigaki (20/20), Iriomote (20/10), Yonaguni (10/9) |
| 1999 | 16–18.November | 50/40 | Ishigaki (20/13), Iriomote (10/9), Kuroshima (10/9), Yonaguni (10/9) |
| 2000 | 15–17.November | 50/36 | Ishigaki (20/13), Iriomote (10/9), Kuroshima (10/7), Yonaguni (10/7) |
| 2001 | 12–13.November | 40/39 | Ishigaki (20/20), Yonaguni (20/19) |
| 2002 | 25. November | 50/48 | Ishigaki (20/20), Iriomote (10/8), Kuroshima (10/10), Yonaguni (10/10) |
| 2003 | 26–28.November | 55/53 | Ishigaki (20/19), Taketomi (10/10), Iriomote (15/14), Yonaguni (10/10) |
| 2004a | - | - | - |
| 2005 | 7–12. December | 55/52 | Ishigaki (10/9), Taketomi (10/10), Iriomote (12/12), Kuroshima (10/9), Yonaguni (13/12) |
| 2006 | 27. November-8.December | 50/45 | Ishigaki (24/23), Iriomote (11/10), Kuroshima (10/7), Yonaguni (5/5) |
| 2007 | 27. November-5.December | 50/45 | Ishigaki (26/23), Taketomi (3/3), Iriomote (17/16), Yonaguni (4/3) |
| 2008 | 11. November-11.December | 51/48 | Ishigaki (21/20), Iriomote (8/7) Taketomi (4/4), Kohama (3/3), Hateruma (5/5), Kuroshima (5/4), Yonaguni (5/5) |
| 2009 | 17–25.November | 52/49 | Ishigaki (15/15), Taketomi (7/7), Iriomote (10/9), Kohama (5/5), Kuroshima (5/5), Yonaguni (10/8) |
| 2010a | - | - | - |
| 2011 | 29. November-1.December | 50/49 | Ishigaki (25/24), Iriomote (20/20), Yonaguni (5/5) |
| 2012 | 3–5.December | 51/47 | Ishigaki (21/19), Iriomote (21/20), Kohama (9/8) |
| 2013 | 11.November-4.December | 50/50 | Ishigaki (11/11), Taketomi (3/3), Iriomote (11/11), Kohama (3/3), Hateruma (5/5), Kuroshima (7/7), Yonaguni (10/10) |
| 2014 | 27.October-26.November | 55/45 | Ishigaki (12/12), Taketomi (3/2), Iriomote (11/5), Kohama (6/6), Hateruma (6/6), Kuroshima (10/8), Yonaguni (7/6) |
| Total | 977/813 |
aSampling was not done in 2004 and 2010
bVNTs: virus neutralization tests