COVID-19 vaccine safety newsletters

NewsletterFIT tracks 4 newsletters that cover COVID-19 vaccine safety as a primary topic, 3 of them with posts in the last 90 days. By publicly shown subscriber count, the largest are Sonia Elijah investigates (11K), Aisling O'Loughlin (4K) and Letters from Australia (3K). Brands detected sponsoring these newsletters recently include COUP.

Updated Oct 30, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    Sonia Elijah investigates 11K subscribers

    Substack Every two weeks · last post 13 days ago

    Likely audience: Public health policy analysts

  2. 2
    Aisling O'Loughlin 4K subscribers

    Substack Weekly · last post 19 days ago

    Likely audience: Parents concerned about vaccine safety

  3. 3
    Letters from Australia 3K subscribers

    Substack Monthly or less · last post 47 days ago

    Likely audience: Public health advocates

    Sponsors detected: COUP

  4. 4

    Substack last post Jan 28, 2026

    Likely audience: anti-vaccine activists

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