TABLE 1.

Grouping of AFP cases according to WHO criteria for case definition, Albania, 1996

Status at clinical follow-up	No. of patientsa
	Confirmed to have polio		Illness compatible with polio		No polio		Total
	Wild type 1 epidemic strain	VAPP	Negative or Sabin strain positive	No sample was available	Negative or Sabin strain positive	No sample was available
Residual paralysis	53	2	28b	6	0	0	89
Dead	3	0	3	10	0	0	16
Missing	18	0	14c	3	0	0	35
Recovered	0	0	0	0	4	1	5
Total	74	2	45	19	4	1

^aAmong the 145 subjects in the three groups, 76 were confirmed to have polio, and 64 had an illness compatible with polio; 5 subjects were excluded, having recovered from illness. 

^bSabin poliovirus type 1 or 3 was isolated from three patients. 

^cSabin poliovirus type 1 or 3 was isolated from four patients.