We want to see if we can determine differences in residual immunity.
2.
If you ignore residual immunity, then mass vaccination does best after an attack.
3.
Experts say those last vaccinated more than three decades ago have little residual immunity.
4.
Because of the residual immunity, we need to make sure they got an adequate dose,
5.
Residual immunity probably accounts for the absence of serious problems in the recent shortages, Cooper said.
6.
The question of how much " residual immunity " to smallpox exists among people who have been vaccinated earlier in their lives remains a medical mystery.
7.
Routine smallpox vaccinations ended in the United States in 1972, and experts believe that those last vaccinated more than three decades ago have little residual immunity remaining.
8.
"When we're thinking about what to do ( with vaccinations ), it's important to understand how much residual immunity people have, " said Dr . Elizabeth Halloran, one of the researchers.
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