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Acknowledged limitations: "the study may underestimate long COVID deaths because clinical guidance for the identification and reporting of PASC has evolved over time and death certificate literal text may contain additional key terms that were not included in this study."
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"Fifth, the investigation only included death certificates that listed COVID-19 as a cause of death, and as a result may underestimate deaths where prior COVID-19 infection was not confirmed or suspected but may have contributed to the death."
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In addition there are numerous known sequelae to COVID that are increased likelihood of other medical conditions, unlikely to be recorded as Long COVID or PASC on death certificates. However, this is a clear early signal that Long COVID is sometimes fatal.
