The foolowing portion has been repeated in the introductory part. Please arrange for removing the portion.

I shall go thorouhly on the artile tomorrow.

Parasites have short lives and populations in comparisons to hosts. Parasites are probably going to adapt to most prevalent gene complexes of their host, which means that there is, in general, a selective advantage to rare alleles and recombination. This principle states that since every improvement in one species will lead to a selective advantage for that species variation normally continuously lead to increase in fitness, in one species, or another. Since in general different species are co-evolving, improvement in one species implies that it will get a competitive advantage on other species and thus, be able to capture a larger share of resources available to all. This means that fitness increase in one evolutionary system will tend to lead to fitness decrease in another system ¹².Evolution of virulence should be viewed from broad biological, epidemiological and clinical perspectives. Man made changes in the environment which facilitates zoonotic transfer of parasites should be urgently addressed.

I have done my Ph. D. in the field of Parasitology. In addition , I have a book on Human Parasitology.