Dear researcher,
First of all I would like to thank everyone of you for combating COVID-19. I have some basic queries regarding re-infection of corona virus. Can a person gets re-infected after recovered form COVID-19? Because, as far as my understanding's concern no drugs is available to kill the virus (as no such scientific claim is there!) so a patient is recovered means we can assume he/she combat the virus by creating some defense mechanism/antibody in plasma. Some news also flashed regarding treatment of corona patient with plasma collecting from recovered people. At this point I want to know if plasma treatment is happening and on the other hand re-infection is also occur, then what happened to the person gets re-infected? In which mechanism he/she recovered from corona virus? Did he/she was unable to create antibody? If so, how did he/she cleared virus from his/her body? If not, what is the future or reality of plasma treatment?
Or else the loop: tested positive->recovered->again tested positive, is a mistake of corona testing process?
I may be wrong some point or less informed, please excuse and help me out to get me the reality.
Thank you for your kind attention.
Sadly at present it seems that the post infection antibody response to SARS-CoV-2 is relatively short lived. Therefore it is possible to be reinfected and the hopes of an effective vaccine are slim.
Reinfection is almost there but antibody already aware and know the virus how to treat it.
Rajkumar Rajendram Can you share/suggest some article regarding life span of any antibody? If such a case exists then what will the future of a vaccine?
https://www.researchgate.net/deref/https%3A%2F%2Fwww.medrxiv.org%2Fcontent%2F10.1101%2F2020.06.13.20130252v1.full.pdf
This article describes antibody responses. They are variable. Few healthcare workers have antibodies.
I believer re infection is possible in immunocomrpomised or immunosuppressed (naturally or acquired or immunosuppressive drugs induced) patients and also depends on the dose of virus they are exposed to. Kind regards
In Iraq no evidence that the infected patients were re infected , but ther's possibility to reinfection
In case of COVID-19, the hypothesis of zero reinfections has not been clinically proven.
Please have a look at the link below:
Article Estimation of the probability of reinfection with COVID-19 c...
Thanks to Arvind Singh and Harasit Kumar Paul for proving valuables references.
Dear Researcher,
It is very interesting to discuss about vaccine of Covid19 that is still in researching in some countries, such as USA. As fas as I know, vaccine in a human body is generated by injection of a small part of Genetic code of Covid 19 (the code not causing infection) that hopefully can stimulate the production of antibodies in blood. It is still questionable, e.i. how far the effectiveness of antibody production in relation to blood types, and human age? is the vaccine can survive in a vaccined body for a longer period without re-vaccination? In term of virus characteristics, most viruses have genetic variability exhibited in the form of Virus Strains. The important question is "is the vaccine in a human body can react to many strains of a common virus (in this case, Covid19). A virus particle is a simple structure: nucleic acid (RNA in Covid19) and proteins formed by codon from combination of bases of the nucleic acid. This causes the virus is easily mutated in nature to formnis strains.