Can tamiflu (oseltamivir) work against sars or swine flu?

Swine flu. At this point, Tamiflu is helpful for swine flu, which is also known as H1N1 flu. Although it has been tried for SARS, (H5N1 flu) but it has not been very effective and, to my knowledge, there are no current effective antiviral agents against SARS. .