New Diseases: Whys And Wherefores
By The Rising Nepal
09 Jul, 2021
Many factors are involved in the causes of new or the re-emergence of old diseases. Emerging diseases can be caused by infectious pathogens like viruses, bacteria, fungus and other microbes present in the atmosphere. Since the 1970s, about 40 diseases like Sars, Mers, Ebola, Chikungunya, Avian flu, Swine Flu, Zika and, most recently, COVID-19 have surfaced in this universe.
In the past, smallpox was a highly contagious and fatal disease before the invention of a vaccine against this dreadful malady....