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  1. 13 de mar. de 2024 · Vitamin D supplementation has a protective effect, against the incidence of COVID-19 in RCT studies,OR 0.403, (95% IC 0.218, 0.747)In the RCTs performed on H...

    • 12 min
    • 672,5K
    • Dr. John Campbell
  2. 23 de dez. de 2023 · Free download John’s textbooks in high res pdf.https://drjohncampbell.co.ukCheck out Campbell's Physiology Notes Dr John Campbell Sold by author on eBay!http...

    • 21 min
    • 929,9K
    • Dr. John Campbell
  3. 26 de dez. de 2021 · Gap between first symptoms and possible complications is only 9 to 10 days with omicronhttps://www.telegraph.co.uk/politics/...Dr Jenny Harries, chief execut...

    • 21 min
    • 122
    • KRTV
  4. 💥Join us on our Journey to 1 Million Subscribers💥 Dr John Campbell is a retired nurse educator best known for his YouTube video commentary during the pande...

    • 78 min
    • 140,8K
    • Triggernometry
  5. www.youtube.com › @Campbellteaching › featuredDr. John Campbell - YouTube

    Hello Everyone,My name is John Campbell and I am a retired Nurse Teacher and A and E nurse based in England. I also do some teaching in Asia and Africa when ...

  6. One of the best resources on Novel Coronavirus 2019 (COVID-19). Watch and learn!

  7. 27 de nov. de 2023 · Free download John’s textbooks in high res pdf.https://drjohncampbell.co.ukCheck out Campbell's Physiology Notes Dr John Campbell Sold by author on eBay!http...

    • 15 min
    • 396,4K
    • Dr. John Campbell