The A549 infected SRV cell were seeded on 12
well plates with density of 104 cells in 2 mL medium
culture/well, then incubated at 37 °C and 5% CO2
incubator. After 24 h, medium was discarded and
added with the 3 mL fresh medium containing 50 μg/
mL of A. paniculata extract or 50 μg/mL lamivudin
as positive control. After 24 h incubation, 500 μL
of medium was replaced with 500 μL fresh medium
containing the same concentration of extract or
lamivudin. Medium replacement was done every
day until 5 days incubation and the plate was kept
in -20 oC until use.