Abstract
The effect of no-spa, papaverine, euphylline, and nitroglycerin on reproduction of influenza viruses A and B is studied in the chorioallantois of chick embryos and in cultured canine renal cells. The optimal effect was produced by no-spa, while euphylline was somewhat less effective. Neither papaverine nor nitroglycerin had any effects on reproduction of influenza viruses A and B. The antiviral activity of no-spa has also been proven in experiments with influenza infection in white mice.
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