Cov kab lus qhia hauv qab no yog txhua yam hais txog PCR kev kuaj xyuas qhov system , los ntawm cov kab ntawv cuam tshuam no, koj tuaj yeem tau txais cov ntaub ntawv tseem ceeb, sau ntawv hauv kev siv, lossis cov ncauj lus tshiab txog PCR nrhiav pom . Peb vam tias cov xov xwm no yuav muab kev pab koj xav tau. Thiab yog tias cov PCR tshawb nrhiav cov kab ke no tsis tuaj yeem daws koj cov kev xav tau, koj tuaj yeem tiv tauj peb rau cov ntaub ntawv tseem ceeb.