1.   It is estimated that over thirty million people are now infected with the virus.

2.   So, it might still be possible for these people to become infected.

3.   These can get into food or water, especially in countries with poor sanitary facilities, and thus infect other people.

4.   The virus has infected many people.

5.   Although HIV kills the immune cells sent to kill the virus, there is widespread variation in the rate at which HIV infected people become ill with AIDS.

6.   Although these people can become infected, typically they stay healthy two to three years longer than those without any copies of the altered gene.

7.   Among the difficulties in turning anthrax into a form that could infect many people is handling it without infecting the handler.

8.   And there were more reports that anthrax had spread to new locations and infected more people.

9.   And while surveillance and spraying can help cut the risk that people will be infected, the virus is probably here to stay and will continue to spread.

10.   Anthrax, a disease usually found in cattle or other animals, can infect people in three ways.