Pan-European Chikungunya surveillance: designing risk stratified surveillance zones

Table 1 Potential annual numbers of viraemic visitors to Europe have been extrapolated from a single week's FlightStats data [50]

European Destination	Chikungunya Active Hotspots	Estimated Incidence (% passengers)	Estimated Annual		Potentially Viraemic Passengers
			Flights	Passengers
France	Reunion	35.71*	1,272	409,200	146,125
	Mauritius	0.81	1,488	497,040	4,026
	India	0.52	2,736	819,264	4,260
	Gabon	0.43	564	150,960	649
	Sri Lanka	0.20	156	36,864	74
	Congo	0.09	564	135,168	122
	Malaysia	0.01	1,020	307,200	31
			*12,240	3,763,584	155,287
Germany	Maldives	3.51	204	52,896	1,857
	Mauritius	0.81	204	54,528	442
	India	0.34	11,208	3,834,000	13,036
	Sri Lanka	0.20	216	54,048	108
	Malaysia	0.01	456	141,840	14
			21,396	7,458,336	15,456
Italy	Seychelles	10.81	144	40,608	4,390
	Maldives	3.51	264	61,440	2,157
	Mauritius	0.81	264	70,320	570
	India	0.01	492	151,200	15
	Malaysia	0.01	492	153,600	15
			3,408	1,060,800	7,146
United Kingdom	Mauritius	0.81	504	158,400	1,283
	India	0.35	6,360	211,136	739
	Sri Lanka	0.20	600	167,040	334
	Malaysia	0.01	1,080	398,112	40
			18,864	4,824,368	2,396
Switzerland	Maldives	3.51	48	12,288	431
	Mauritius	0.81	48	13,920	113
	India	0.24	2,304	610,512	1,465
			6,144	1,858,304	2,009
Belgium	India	0.19	3,025	878,976	1,670
	Congo	0.09	408	118,800	107
			3,637	1,054,416	1,777
Netherlands	India	0.20	2,136	610,512	1,221
	Malaysia	0.01	2,136	811,680	81
			6,936	2,389,632	1,302
Spain	Mauritius	0.81	480	13,920	113
			936	184,560	113
Totals			73,561	22,594,000	185,486

(*Note totals for each European country include visitors from other Chikungunya active regions, not listed as the estimated number of viraemic visitors was <1)

ISSN: 1476-072X