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Cornell University - Vaccination not Preventing Infection
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<blockquote data-quote="hedrick" data-source="post: 76314914" data-attributes="member: 239032"><p>From <a href="https://covid.cdc.gov/covid-data-tracker/#vaccinations_vacc-total-admin-rate-total" target="_blank">COVID Data Tracker</a>, doses. Note that it takes two doses to be fully vaccinated for the first two.</p><p></p><p>Pfizer 243M</p><p>Moderna: 155M</p><p>J&J:15M</p><p></p><p>Moderna has shown somewhat higher effectiveness than Pfizer, and less decline over time. J&J is significantly less effective than either, probably because it's given as just one dose.</p><p></p><p>If you are over 65, you should plan to get a booster at 6 months for Pfizer or Moderna. Anyone getting J&J should plan to get a booster at 2 months.</p><p></p><p>The justification for boosters given by the manufacturers was different:</p><p>* Pfizer gave data for those over 65 showing a decline in effectiveness over time.</p><p>* Moderna gave data showing simply that immunity increased after a booster, independent of time. There's not clear data for Moderna showing a decline. And the increase in effectiveness wasn't very impressive for under 65. My guess as a non-medical person is that people over 65 can benefit from a booster simply because older people don't react as strongly to vaccines in general. That's why we get larger doses for flu shots.</p><p>* J&J showed a large increase in immunity for everyone. Some FDA person said that it really should have been two doses all along.</p></blockquote><p></p>
[QUOTE="hedrick, post: 76314914, member: 239032"] From [URL='https://covid.cdc.gov/covid-data-tracker/#vaccinations_vacc-total-admin-rate-total']COVID Data Tracker[/URL], doses. Note that it takes two doses to be fully vaccinated for the first two. Pfizer 243M Moderna: 155M J&J:15M Moderna has shown somewhat higher effectiveness than Pfizer, and less decline over time. J&J is significantly less effective than either, probably because it's given as just one dose. If you are over 65, you should plan to get a booster at 6 months for Pfizer or Moderna. Anyone getting J&J should plan to get a booster at 2 months. The justification for boosters given by the manufacturers was different: * Pfizer gave data for those over 65 showing a decline in effectiveness over time. * Moderna gave data showing simply that immunity increased after a booster, independent of time. There's not clear data for Moderna showing a decline. And the increase in effectiveness wasn't very impressive for under 65. My guess as a non-medical person is that people over 65 can benefit from a booster simply because older people don't react as strongly to vaccines in general. That's why we get larger doses for flu shots. * J&J showed a large increase in immunity for everyone. Some FDA person said that it really should have been two doses all along. [/QUOTE]
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