Because of Xiaotian, the country's epidemic was stamped out directly, and this kind of medicine belonged to the category of progressive vaccines.
Simply put, the epidemic could evolve, but the antiviral property of this vaccine would also increase, growing even faster than the virus itself.
As for side effects, Xiaotian dared to swear that this vaccine absolutely had none, because this medicine only enhanced the human body's resistance and self-healing abilities.
Chapter 296