8 as apparently seen therefrom the compound has host defense function against vaccinia virus infected mice table 8______________________________________ inhibitiongroup dose mg kg number of pocks ______________________________________control 33 u00b1 3treated 0 1 23 u00b1 2 41 0treated 10 0 22 u00b1 4 43 5______________________________________ in the table mean u00b1 standard error value n 10 significant difference from control group giving no compound p lt 0 001 an antiviral effect of the compound according to the invention is investigated with an experimental influenza virus infection model of mouse influenza virus a pr s strain was inoculated into a trachea of balb c male mice at 9 0 pfu mouse the organogermanium compound example 4 dissolved in 4 bovine serum albumin solution was orally administered at the dose of 0 1 1 0 and 10 0 mg kg once a day for 6 days from the day just after the infection to the 5th day therefrom a mortality of the mice was observed over 20 days from the virus infection results are shown in following table 9 in the control group some mice were died on the 8th day from the infection and all of them have been died until the 10th day from the infection on the contrary thereto in the test groups and more particularly the test group by the dose of 1 0 mg kg the first death was observed on the 10th day from the infection and 4 mice alive at the time when the test period of time 20 days from the infection was lapsed on average life period of time a significant difference has been recognized in each of testing groups in comparison with the average life in the control group table 9______________________________________ dose average lifegroup mg kg day ratio of survival______________________________________control 9 1 0 10test a.