13. COVID Immunity

<div data-draftjs-conductor-fragment= "{"blocks":[{"key":"7geal","text":"How long does immunity last after a COVID infection? News reports of two recent studies suggest that it wanes quickly and that some patients may never have immunity at all. In this episode, we take a look at those studies and explain why they don't exactly say what is being said about them.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"a798r","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"f92oa","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"6h6bq","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"dio1k","text":"Take home points","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"6v94l","text":"Not everyone keeps detectable IgG after asymptomatic or symptomatic infection ","type":"unordered-list-item","depth":0,"inlineStyleRanges":[{"offset":0,"length":78,"style":"{\"FG\":\"#000000\"}"},{"offset":0,"length":78,"style":"{\"BG\":\"#ffffff\"}"}],"entityRanges":[],"data":{}},{"key":"asdri","text":"If you have asymptomatic COVID-19 infection, you are less likely to have detectable IgG at 8 weeks compared to someone who had symptoms","type":"unordered-list-item","depth":0,"inlineStyleRanges":[{"offset":0,"length":135,"style":"{\"FG\":\"#000000\"}"},{"offset":0,"length":135,"style":"{\"BG\":\"#ffffff\"}"}],"entityRanges":[],"data":{}},{"key":"4jb1p","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"c9q3m","text":"What we still don't know","type":"unstyled","depth":0,"inlineStyleRanges":[{"offset":0,"length":24,"style":"{\"FG\":\"#000000\"}"},{"offset":0,"length":24,"style":"{\"BG\":\"#ffffff\"}"}],"entityRanges":[],"data":{}},{"key":"dpq26","text":"Does this drop or absence of IgG correlate to decreased immunity? The reflex answer would seem to be 'yes' but we still don't und