Word: viruses
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...also dilute existing doses just enough to inoculate everyone - without, we can only assume, compromising the immunizing threshold of the vaccine. The vaccine, drawn from active smallpox cultures, can also slow or stop the advance of the disease if administered during the first four days after exposure to the virus...
...Harrison: Smallpox is a virus. It?s a naturally occurring disease that?s transmitted from person to person via "droplet nuclei," or saliva, somewhat analogous to chicken pox. It first evolved long, long ago and eventually became a major pathogen for humans...
...Well, with anthrax, either you?re exposed to the attack medium, or you?re not. Anthrax is very containable and very treatable. With smallpox, on the other hand, you?re dealing with a highly contagious virus that, if it were used as a bioweapon, has major potential for damage. Also keep in mind that we?re living in a very susceptible society; we stopped vaccinating people in the early 1970s...
Hepatitis B is not so easy to catch, but it's still serious. Each year it kills about 5,000 Americans, and many thousands more develop a chronic infection that in some cases will trigger liver cancer or other problems. The hepatitis-B virus is generally transmitted in utero from mother to child, through sexual activity or by close contact with infected blood. A vaccine is available...
...often through sexual contact or tainted blood. Hepatitis C, however, is much more likely to lead to serious complications. No vaccine is available, but last week researchers in Germany reported that giving interferon at the earliest stages of a hepatitis-C infection dramatically increases the chances of clearing the virus from the body...