A preliminary laboratory study by an health organization show that a wide variety of commercial teas appear to either inactivate or kill viruses. Several types of green and black teas, regular or iced, were tested on animal tissues infected with such viruses as herpes simplex 1 and 2 and the T1 (bacterial) virus. It was observed that iced tea or regular tea destroy or inactivate the (herpes) virus within a few minutes. Similar result was obtained with the T1 virus. Although it is not clear how tea interferes with the survival of these virus, but it is clear that these teas can keep health safe from the effect these health destroying viruses, even in their diluted state, they are still effective. A closer study has also showed that black tea has somewhat more potent antiviral effect than green tea. So safe your health from these health damaging viruses by taking black tea at least twice per week.