Lin Feng saw two people coming downstairs, squatting on the threshold, distracted, he felt that the ancient city of Dongli was overflowing with indescribable oppressive darkness.

Although Lin Feng is not a doctor, he has naturally learned a lot of medical knowledge. He knows that if it is a common infectious disease, there will be more or less abnormal in the air, and there will be many semi-healthy people.

Although their antibodies make them less susceptible to infection, there should be some symptoms or morbidity anyway, but they are not.

The only explanation is that the military is well aware of the epidemic and is highly contagious and poisonous, so...