Elisa antibody (Elfa) test negative in 23 weeks if equal to RET Elisa test so that Elisa antibody (Elfa) test negative in 23 weeks 03 days means 164 days negative it's 100% conclusive and no needed further test. Some doctors advised not needed. So please give me confirm reply. 4 days short for 24 week if can my negative result change in future?

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