resistant virus/amn

21.   The virus soon comes back when people stop their drugs, but all measurable levels disappear when treatment resumes, and no resistant viruses have been seen so far.

a. + virus >>共 413 个
deadly 13.24%
new 7.80%
live 2.36%
cold 2.07%
contagious 2.01%
killer 1.95%
lethal 1.89%
c 1.77%
human 1.42%
mosquito-borne 1.30%
resistant 1.24%
resistant + n. >>共 108 个
strain 20.27%
bacterium 10.96%
virus 6.98%
variety 4.65%
form 3.65%
infection 2.66%
bug 2.33%
microbe 2.33%
insect 1.99%
crop 1.66%
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