Conversation

Notices

1. Embed this notice
   Marc Veldhoen (marc_veld@mastodon.online)'s status on Thursday, 08-Aug-2024 02:35:07 JST Marc Veldhoen

   Waning of Maternal Antibodies Against Measles, Mumps, Rubella, and Varicella in Communities With Contrasting Vaccination Coverage

   Does this paper provide support that vaccines undermine immune protection? No.

   https://academic.oup.com/jid/article/208/1/10/796786
   1/9

   • Embed this notice
     Marc Veldhoen (marc_veld@mastodon.online)'s status on Thursday, 08-Aug-2024 02:35:03 JST Marc Veldhoen

     in reply to

     There are 3 considerations. Protection of infants wanes well before the first vaccination (14 months) leaving them more exposed than is ideal.

     What about the lower level of antibodies? Do vaccines induce fewer antibodies compared to infection? There is no evidence for this.
     6/9

     Bill repeated this.
   • Embed this notice
     Marc Veldhoen (marc_veld@mastodon.online)'s status on Thursday, 08-Aug-2024 02:35:03 JST Marc Veldhoen

     in reply to

     Most likely, the exposure rate between non-vaccinated communities, with more children, less protection, and vaccinated communities with fewer children, more protection, is different.
     7/9

   • Embed this notice
     Marc Veldhoen (marc_veld@mastodon.online)'s status on Thursday, 08-Aug-2024 02:35:04 JST Marc Veldhoen

     in reply to

     For Measles (51.1% and 12.6% vax rate), and Rubella (65.6% and 17.2% vax rate), mums in the general population had lower levels of antibodies (4x and 55x), despite higher vax rate. As a result, babies get less antibodies and may be susceptible to infection sooner.

     5/9

   • Embed this notice
     Marc Veldhoen (marc_veld@mastodon.online)'s status on Thursday, 08-Aug-2024 02:35:05 JST Marc Veldhoen

     in reply to

     This may be the case because antibodies wean and immunity protects against transfer, infection and frequently less robust responses are required upon reinfection.

     This is a cross-sectional serologic survey 7904 subjects (32.7% of invited), conducted in NL during 2006–2007.
     3/9

   • Embed this notice
     Marc Veldhoen (marc_veld@mastodon.online)'s status on Thursday, 08-Aug-2024 02:35:05 JST Marc Veldhoen

     in reply to

     The authors did not find differences in antibody levels and halflives in mums and babies between the general population and the religious population regarding Mumps antibodies (25.3 and 10.1% vax rate).

     4/9

   • Embed this notice
     Marc Veldhoen (marc_veld@mastodon.online)'s status on Thursday, 08-Aug-2024 02:35:06 JST Marc Veldhoen

     in reply to

     Childhood vaccinations have been in use for a long time, an example is the MMR vaccine against Measles, Mumps and Rubella. These vaccines are offered in early life. This may have consequences for the level of antibodies transferred during and after pregnancy.
     2/9