Ivermectin in Africa and Brazil

Ivermectin Prophylaxis Used for COVID-19: A Citywide, Prospective, Observational Study of 223,128 Subjects Using Propensity Score Matching (Brazil)


Ivermectin has demonstrated different mechanisms of action, coronavirus infection and COVID-19-related comorbidities.

Prophylaxis combined with the known safety profile of ivermectin

Study to evaluate the impact of regular ivermectin use on subsequent COVID-19 infection and mortality rates.

Prospective, July 2020 and December 2020

Inviting the entire population of Itajaí to a medical visit to enroll in the program,

ivermectin was offered as an optional treatment to be taken for two consecutive days every 15 days at a dose of 0.2 mg/kg/day.

Study analysis consisted of comparing ivermectin users with non-users using cohorts


223,128 citizens of Itajaí considered

159,561 included in the analysis

113,845 (71.3%) regular ivermectin users

45,716 (23.3%) non-users

Of these

4,311 ivermectin users were infected, (3.7% infection rate)

3,034 non-users (6.6% infection rate)

A 44% reduction in COVID-19 infection rate

Risk ratio (RR), 0.56

The regular use of ivermectin led to a 68% reduction in COVID-19 mortality


25 (0.8%) deaths in the ivermectin group

79 (2.6%) among ivermectin non-users

RR, 0.32

p less than 0.0001

When adjusted for residual variables, reduction in mortality rate was 70%

There was a 56% reduction in hospitalization rate

44 in the ivermectin group

99 in non ivermectin users

After adjustment for residual variables, reduction in hospitalization rate was 67%

p less than 0.0001


In this large study, regular use of ivermectin as a prophylactic agent was associated with significantly reduced COVID-19 infection, hospitalization, and mortality rates.

Written by Dr. John Campbell

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 time permits. These videos are to help students to learn the background to all forms of health care. My PhD focused on the development of open learning resources for nurses nationally and internationally.


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  1. The article has a paragraph entitled "Limitations". Subjects were self-selecting in opting to take the drug. This is not a randomised or blind trial which would be needed before drawing conclusions. Those opting for the medicine may be more fearful of catching Covid and therefore more likely to practice social distancing, mask wearing and other avoidance strategies. Such behaviour could easily explain the differences found in the study.

  2. Thank you for this video! I spread the word about that study approx. 1 month ago and was attacked pretty harshly for it and had to defend myself with further proof for the efficacy / effectiveness of Ivermectin. They still didn't believe it. The mainstream media and official health representatives brainwashed them into believing Ivermectin is only to be used against parasites, and best not on humans but on animals.

  3. Absolutely maddening that the US healthcare and political systems forced us away from this medicine when it has BEEN clear how effective it is. When do the lawsuits start?

  4. Dr John the fB fact checking is ridiculous
    I posted your great video and they said it could be misleading

    Your videos are pure truth with no money insensitives, very clear information from there own information

    You are a hero
    well done for speaking the truth that you see

  5. Why did they not have a vaxxed group? Is there another comparable group in the world that could be used to estimate how vaxxed are effected.

    Add my name to the IVM group. Omicron is the only vax I have taken. Sad day for BG MS.

  6. Dear John,
    I'm not a doctor, but the last two years definitely made me very critical when it comes to researches.. thanks to you and other doctors/professors I was following who helped me with building that critical skill, which until the last two years ago I had no need to aquire..

    So, my critical observation raises a red light regarding the fact that there was no information regarding the age groups..

    perhaps more elderly people in the non-ivermectin group could affect the results?

    Regards! Thank you for your support in passing unjustifiedably suppressed ideas.

  7. Ivermectin greatly helped my parents, but had adverse effects for me. Granted I've a prolapsed heart valve, and am on an aspirin regimen. The doctor who prescribed ivermectin didn't even ask if I was on any blood thinner.

  8. Dr Campbell thank you so much for your thorough analysis and non judgemental approach in your reporting. This information is rather alarming in terms of big pharma not allowing this treatment in many countries. Disgusting actually. They should all be charged with mass murder and sentenced accordingly!

  9. I have results from 5 unvaccinated infected with omicron, all of them taking different protocols. 3 with IVM and 2 without IVM. I'm willing to write down the protocols each one took and the results in terms of symptoms if you are interested.

  10. Anyone advocating Ivermectin was repeatedly de-platformed and referred to as a tin hat conspiracy theorist. The BBC and many others described it as horse dewormer. Governments are still pushing vaccines whilst the vaccine safety data has been suppressed. At last Pfi*er are subject of a court order to disclose it. The whole thing is money driven and shameful.

  11. I'm sure the powers that be in first world countries at the start knew various drugs may surface that may end up good but keeping the public vaccine focused was the chosen path how many wound not be vaccinated with stories of alternatives in the main stream its rubbish being kept in the dark but I can understand why such decisions are taken.

  12. It is unconscionable that the world's media ignores this conclusive data and refuses to cover the enormously positive life-saving clinical study's results – a massive criminal coverup in so many ways – as the fear of being considered a social pariah has literally frozen many into acquiescing to the Pharma-driven official narrative only. Their lobbyists run this country and much of the world – the system is broken.Can we silently tolerate the deaths of millions due to their over-riding greed?

  13. Closed minded people are going to say that the reason it works on these people in those areas is because they feel better because they previously had worms. I had a doctor say this to me. And there is a illustration going around that say's, "He died with no worms." Nice, eh? I wish more people were more open minded and less like sheep. So, personally, I am keeping an open mind on this subject.

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