Table 2. The H7N9 virus isolated from serum and tissue leachate of mice.

H7N9 virus strain	Sample	2 dpi	4 dpi	6 dpi
A/Guangdong/GZ8H002/2017(H7N9)	Serum	+	+	+
	Lung	+	+	+
	Brain	−	−	+
A/Zhejiang/DTID-ZJU01/2013(H7N9)	Serum	+	−	−
	Lung	+	+	+
	Brain	−	−	−

Note: +: Positive −: Negative; dpi, days post infection.