21.   The smallpox vaccine not only protects against infection, but if administered early it can help an infected person fight off the virus.

22.   The vaccine has completely protected monkeys against SIV disease for more than three years, the strongest and longest lasting of any AIDS-related experimental vaccine.

23.   The vaccine protected against both A and B strains of the flu virus.

24.   The vaccine protects only against respiratory illnesses caused by influenza viruses, she cautioned.

25.   The varicella vaccine may also protect against shingles, a painful nerve condition.

26.   This year, as usual, the vaccine protects against three strains.

27.   To find out whether the existing anthrax vaccine will protect against this superbug, the United States is considering whether to develop its own version.

28.   A vaccine can protect against the germ that is thought to cause stomach ulcers and some stomach cancers, Italian researchers have shown in a laboratory experiment with mice.

29.   MMR vaccine protects against three diseases, mumps, measles and rubella.

30.   The current vaccine protects against the bubonic form of plague but not the inhaled variety, which is feared as a terrorist weapon.