hello,jackie you should have to aware from bird flu because bird flu is very dangerous diseases,now a days bird flu virus are attacking on mostly country.
my friend also are passed by bird flu virus so he told me tamiflu drugs for bird flu treatment.so i can say that you also take tamiflu to your sister.To know more about tamiflu see
http://www.drugdelivery.ca/s3353-s-tamiflu.aspx
This contains a lot of information on tamiflu.