Coronavirus: low antibody levels raise questions about reinfection risk | South China Morning Post
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A recent systematic research done in Shanghai shows that antibody testing is not as simple as many thought. Being antibody positive may, of course, mean that one has developed post-infection immunity, but 30% people tested are showing low level of antibody, which means risking be reinfected. Furthermore, in other reports, researchers noted that low level antibody is seen among asymptomatic virus carriers who are contagious for quite long time …
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