There are many antiviral injections, each of which basically targets only one viral infection, or several, and not one antiviral injection can target all viruses. In clinical practice, when viral infections are present, it is best to determine the relevant pathogens and then apply the appropriate drugs, and not to apply them indiscriminately. Anti-viral shots commonly used are interferon, ribavirin, a broad-spectrum antiviral drugs, for diseases such as measles and hand, foot and mouth disease, in the absence of targeted antiviral drugs, you can use ribavirin. Others, like acyclovir and ganciclovir, have specific pathogens to treat. For influenza virus, the injections are paramivir. Antiviral injections, basically, are targeted.