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Why vaccines are less effective in the elderly, and what it means for COVID-19 – The Conversation CA

Immunosenescence — the decline of immune system function with age — means that vaccines are not as effective in older adults, the demographic most susceptible to many diseases, including COVID-19.



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As the global spread of severe acute respiratory syndrome coronavirus (SARS-CoV-2) the cause of COVID-19 continues, we learn more about the effects of this new virus.
For many respiratory pathogens, including influenza viruses and respiratory syncytial viruses, the elderly experience the most severe forms of disease and the highest death rates. For example, for every 10,000 Americans between 18 and 49 years old, only 0.4 people die from the annual flu. That number increases to 5.9 people per 10…

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