The use of natural products is growing everyday around the world. Herbal phytoconstituents have been effective in the past reducing infectious conditions for many years, before antibiotics were introduced. Herbal medicinal products appear to be an alternative for the manufacturing of novel antivirals, antibodies, vaccines, growth factors and cytokines. Identifying the antiviral mechanisms, of these herbal medicinal products has elucidated on how and where they interact or interrupt with the viral life cycle. This includes viral input, replication, assembly and release, as well as virus-specific interactions. The greatest advantage of using products that originate from plants to produce vaccines is the inability they have to replicate human pathogens, because these products can diminishing the risk of contamination and making the purification process less strident. In otherwise they can be produced in massive quantities by molecular farming in plants, reducing the cust of production.