Re-Emerging Microbes
The reappearance of microbes that had been conquered successfully or controlled by medicines and vaccines is distressing to the scientific and medical communities, as well as to the public. One major cause of disease re-emergence is that many microbes responsible for causing these diseases are becoming resistant to the drugs used to treat them. Some examples of re-emerging infectious diseases that are of significant public health concern are dengue, malaria, TB, and polio.