The researchers were specifically looking for IgG antibodies in the study, and CNN notes that some other research has suggested "that other types of antibodies may persist longer than IgG does."

“該案涉案犯罪嫌疑人多、犯罪事實多，又案發壽光、昌邑、濱海等縣市區和海漁、農業、交通、國企等多個行業係統，案情極其複雜。”濰坊市紀委監委有關負責人介紹說，市紀委監委及時與公安機關對接、主動跟蹤偵辦，按照“一案一專班”要求，抽調20餘名紀檢監察精幹力量組建辦案專班進行集中攻堅，形成“大兵團”作戰格局。

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