To multiply, viruses must take over the functions of the cell they infect. why does it make it difficult to make effective antiviral drugs?

Because when you attack the virus you have to kill of your own cells. That makes them hard to detect too bcs they hide in your cells

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey