Hello all, Greetings! Covid-19 is not yet fully clear so many many thoughts keep on brainstorming us, logically. I have these confusions and questions. :- 1. Antibodies against this virus said to persist in body for 4-6+ months or so either post infection or post-vaccination. My confusion is, how these antibodies persist for so long. Is it its natural and normal lifespan or it has some yet unclear purpose ?If later, what can it be? Also can such persistence of antibodies in our body be also harmful since cultural targets were to develop Immunological Memory based immunity instead of long existing antibody based immunity. 2. Many Medication or vaccines may be based on disturbing normal/natural activities of Virus esp. intra-cellular after infection of virus into the host cells. May it be by inactivated virus based vaccine or by interfering the normal activities of virus, replications etc. i.e disturbing the RNA or genome of virus. As felt, Virus is live once it is intra-cellular and its genome is really effective for its growth. Whole virus is not needed for such purpose. If so then, can it become a reason to get its variant or new form by such changed genome? I mean, can disturbing genome natural structure or activity of Covid-19 Virus lead to new variants or even new type of virus? Pls contribute. Best wishes.