Because of the similar immune response of [nonhuman primates] and human beings, [nonhuman primate] models are better to evaluate vaccines than other animals. Chuan Qin More Quotes by Chuan Qin More Quotes From Chuan Qin No viral load was detected in these main tissues on [day five] after the monkey was exposed to the same dose of virus again, so, we think the coronavirus did not survive for a long time in the body. Chuan Qin