TABLE 3.

Virus amounts in lung tissues from two pigs in each group^a

Day p.i.b	Amt.c of virus
	Group 1		Group 2		Group 3
	Pig 1	Pig 2	Pig 1	Pig 2	Pig 1	Pig 2
1	6.09	3.09	0	0	0	0
3	9.87	10.65	0	0	0	0
5	11.75	11.00	4.39	2.50	0	0
7	10.39	10.44	3.39	3.71	0	0
10	9.84	10.40	3.22	3.98	0	0
14	9.74	10.48	3.33	3.24	0	0
21	10.11	9.29	2.72	3.28	0	0
28	7.02	7.93	2.52	3.87	0	0

^aSee Table 2, footnote a.

^bOn each day p.i., two pigs from each group were euthanized to measure the virus amounts in the lung tissues.

^cLog₁₀ PRRSV copies/g.