bacteria is a biological puzzle?
Answers
Foremost, viruses are neither living nor non-living. They are simply inanimate, complex organic matter and can’t even multiply on their own. Yet, they manage to infect and hijack the host cell machinery so as to make copies of the virus.
Many viruses have this knack of evading the immune system by constantly changing their genetic material. So whatever Antigenic peptide was presented (if any) by and to the cells of immune system for generating a response against these viruses, cannot be used for carrying out an immune response with substantial intensity, because the genetic sequences of the virus has changed. (It is like when you have to go to the airport to catch a criminal you have never met. But you are given a recent photograph of them so that you identify them. No big deal, right ? But then, they are too clever and just had a major reconstructive plastic surgery so that their face is nothing like in the photograph you’ve been given. And they pass by you, uncaught, right under your nose.)
This poses a constant challenge in the way of drug/vaccine development against many diseases caused by viruses, be it flu or HIV.
I reckon this suffices for viruses to be called as “ Biological puzzles”.
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