A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).



Australian Speakers Agency


The nerds have the numbers on precious metals investments on the ASX

The Skeptics Handbook

Think it has been debunked? See here.

The Skeptics Handbook II

Climate Money Paper



Fully vaccinated can be just as infectious as unvaxed (What’s the point of a Vax Passport?)

These first generation vaccinations are not the Get-Out-Of-Pandemic Card some politicians dream of

What a can of nematodes

Fully-vaccinated people who catch Delta Covid variant really may be JUST as infectious as the un-jabbed, Government figures suggest

Emily Craig, Daily Mail

Public Health England say viral loads appear similar among people infected with the Delta variant in both groups, meaning, theoretically, they are equally contagious.

But health chiefs insisted the current crop of vaccines still cut the risk of catching the virus in the first place.

Vaccinated people may be less likely to catch Covid (at least for a few months until it wears off) but when vaccinated people do get infected the viral loads are pretty much the same as when unvaccinated people do. In other words, fully vaccinated people can still be dangerous to the people around them. And if they fly in without quarantine, they can bring outbreaks and new mutants too. So much for the freedom jabs. Though, in fairness, at the moment, they still offer some freedom from hospital, just not freedom from masks, quarantines, and restrictions.

Vaccination clearly isn’t going to stop the spread, eliminate the […]

Get serious about Borders: The biggest failure in NSW was letting one limo driver get infected

UPDATE: New readers might find it hard to get their head around this post. Stick with me. There is a path to freedom from masks, mandatory vaccines and from Chinese bioweapons. But we must plan ahead and understand virology. Strangely, the tool no one wants to mention is Sovereign Borders.

* * *

There might have been no lockdown in Sydney (and then Melbourne, Perth, and Brisbane) if that one Limo driver had been protected

Nobody is talking about the best way to stop lockdowns in Australia — stop the virus leaking in through shoddy quarantine in the first place. “Hard Borders”.

Odds are, we could have stopped the July lockdowns if we made sure drivers of flight crews and international arrivals weren’t put at risk. It’s not about vaccines, which reduce but don’t stop people catching the virus, it’s about a $50 type solution that stops a billion dollar lockdown. The economy of a city of five million (and indirectly the rest of the nation) is relying on just leaky vaccines, masks and hand sanitizer when there are so many better options.

So far, thanks to one leak, 2,227 people have been infected, 10 people have […]

Israel data: Vaccines only 16% effective after 6 months but still prevent 86% hospitalization

Good and bad news about long term vaccine effectiveness is coming out of Israel. Protection from catching Covid plummets after a few months. Only 1 in 6 people who were vaccinated against Covid in January still have enough protection left to stop themselves catching and spreading Covid. The good news is that five out of six still have good protection against hospitalization and severe disease.

Thanks to David Archibald who says “The coronavirus vaccines are an immunological Potemkin village”

The Israeli data above is what sent the markets sliding on Monday. Ouch!

Vaccine efficacy in Israel from people vaccinated in January, Febuary, March and April this year.

Forget herd immunity and Vax-passports

The new results mean taking a vaccine is more a personal decision about risk benefits, less “one for the team”, though it may reduce the risk of transmission. Toss out the idea that a vaccination passport offers meaningful protection and get used to the idea that people can and will catch Covid from the double vacced. There is little medical justification for giving extra rights or free access to vaccinated people.

Israel used the Pfizer vax mostly.

Efficacy against infection, asymptomatic and symptomatic, falls […]

In Mexico deaths were 50% higher for 8 months, then they start Ivermectin…

For a whole year more people were dying in Mexico than normally died. There’s been one long bloodbath there and an untold story. Mexico may not have hit the “photogenic” headline stage that Brazil, Iran, and India did, but nonetheless, somewhat unnoticed, it’s been continuously bad. Mexico has the dubious honor of being one of the worst for testing, with positivity rates at the virtually the highest in the world, running at 35% and even reaching over 50% at times. Few countries have had higher rates (currently only Tunisia, Namibia, maybe Colombia are worse). The Case Fatality Rate has run at 12% for a year, only confirming that there weren’t enough tests to know the real scale of the infections. The excess deaths graph tells its own story. The wave of 2020 ran for a whole year with deaths running at 50 – 100% higher than in a normal year. Since the pandemic began some 350,000 excess deaths have been recorded. The death toll for Covid in Mexico may be 60% higher than the official Covid casualty count of 230,000. As winter made the situation even worse, things got desperate enough (finally!) for cheap treatments to be organized.

Ivermectin use […]

Ivermectin may prevent 86% of Covid cases, and the UK will do a hobbled trial of it

The new super meta review of Ivermectin is out. It’s 27 pages of fine print detail and 144 references, and it’s very impressive.

Ivermectin…. by Fvasconcellos

Bryant et al soaked themselves in 24 studies involving 3,406 people and found that ivermectin use reduced deaths by a very nice 60% with “moderate certainty”. But ivermectin appears to be at its best when used to prevent infections in the first place. There was “low certainty” but with prophylactic use Covid infections were reduced by an average of 86% . But by the time patients were “in need of mechanical ventilation”, the data, while muddy, suggested ivermectin was not much help.

The bad thing about Ivermectin is that there are not many bad things. It’s too good, too cheap, too safe, and too far out of patent to be profitable.

Given the evidence of efficacy, safety, low cost, and current death rates, ivermectin is likely to have an impact on health and economic outcomes of the pandemic across many countries. Ivermectin is not a new and experimental drug with an unknown safety profile. It is a WHO “Essential Medicine” already used in several different indications, in colossal cumulative volumes.


Indias Health dept stops Ivermectin use but others sue the WHO

The good news is that there is a way out of the new mutant load. The bad news is the Swamp is in the way.

India’s caseload has continued to shrink since we last looked at it. Which is great news, but instead of endorsing the approach that worked, the health ministry is now writing to doctors telling them not to use Ivermectin and Hydroxychloroquine.

Indeed the new recommendations even go so far as to say that zinc and multivitamins are out too. Even zinc?

Ponder that Ivermectin is so powerful it even destroys multivitamins.

Is the day coming when we see antivirals suddenly accepted like the Wuhan Lab theory was? Lives depend on it, but vast piles of money do too. The medical censorship swamp is well equipped, and I suspect, has years of experience. There are so many anti-viral medicines, they’ve been around for years and all the financial incentives not to use cheap out-of-patent drugs have always been there.

Here are the graphs of infections in some states of India:

So who leaned on the Indian officials? Who knows?

Ivermectin, Doxycycline Dropped From List of COVID-19 Drugs by Health Ministry

New Delhi: […]

A cloud of Covid variants circles the globe

Mutations of SARS2 are roaming. Currently there are 19 million active (known) cases of Covid. Due to copying errors, mistakes are accumulating in the genes of the virus. It’s a relentless process of trial and selection. A trillion monkeys on keyboards blindly working its way around vaccines, and immune systems. To beat this, we need to understand it.

Below is a map of known variants created from the samples which have had full sequences done. This is the remarkable “Nextstrain“ — an opensource tool. I have labelled a few clusters by their “country names”, (though we’re not supposed to do that. Let’s all say “WuFlu”.)

The family tree of SARS-Cov-2 starts at the bottom left corner with two samples from Wuhan around Christmas 2019. This is called the 19A clade, which appears to have almost died out now, though there are still remnants left of this original virus in corners like Iran and PNG. Otherwise, the Wuhan 19A virus has been superseded by its children.

The branches and time marches to the right.

Nextstrain: Latest global SARS-CoV-2 analysis

The code for one full virus is 29,000 bases long and as best as I can tell, all the dots […]

Summer deaths: How to ignore most variables and a great trend and still blame climate change

This might be one of the most incompetent studies of 2o21

Hanigan, Dear and Woodward have done a “unique”, first of, *groundbreaking study* that finally shows climate change is having a detrimental effect on our health (so they say). With great effort to ignore almost every variable that mattered, they found the seasonal ratio of deaths in Australia has changed:

”More people die in winter than summer, but climate change may see this reverse

In our study published today, we show some of the first evidence climate change has had observable impacts on Australians’ health between 1968 and 2018.

We found long-term heating is associated with changed seasonal balance of deaths in Australia, with relatively more deaths in summer months and relatively fewer deaths in winter months over recent decades.

Our findings can be explained by the gradual global warming associated with climate change. Over the 51 years of our study, annual average temperatures increased by more than 1°C in Australia. The last decade (2011 to 2020) was the hottest in the country’s recorded history.

The other interpretation is that it got warmer and deaths in winter declined more than deaths in […]

Covid: Biggest risk factor is not being fat or diabetic — but sitting still

Could we halve the death rate if we just exercised 25 minutes each day?


A lot of people were asked how much they exercised a couple of years ago. In follow up, about 50,000 went on to catch Covid last year. They were sorted into three levels of exercisers — the 7% most active consistently got 150 mins of week of something akin to “brisk walking” or more. The slowest moving 15% qualified as true couch potatoes — doing less than 10 minutes of exercise a week.

Sadly for the least active, they were 2.3 times more likely to need to go to hospital, 1.7 times more likely to be sent to the ICU and 2.5 times more likely to end up in the morgue.

These are pretty stark figures — making sedentary behaviour more risky than obesity, smoking, diabetes and high blood pressure. Which all seems a bit surprising given how many hours of data collection and TV commentary has been spent on all the smaller risks. How did we manage to miss one of the most important variables there is?

Exercise is “one heck of an anti-viral”

If these results are correct, it suggests most […]

Vitamin B6 may reduce the cytokine storms of Covid

Maybe getting enough Vitamin B6 will reduce deaths

The main two things that kill people with Covid are blood clotting and an out-of-control inflammation known as a cytokine storm. A group of researchers noticed that both of these were things Vitamin B6 was known to reduce — blood clotting, and inflammation. In particular, there’s a molecule called Interleukin 6 which is a “masterplayer” signal in our immune system and — what do you know — B6 reduces it. Mice that weren’t fed enough B6 got mouse pneumonia more than mice who were fed enough. B6 is anti-inflammatory, anti- and reduces reactive oxygen species (ROS).

The Big Black hole in medical research?

I hoped this paper was report on experiments with Covid patients, but the paper and press release is essentially a literature review of many pre-covid studies and a plea for research into whether vitamin B6 might help stop the deadly cytokine storm.

The bigger, global question they don’t ask, is why despite the millions (billions) going into vaccine design and drug research, hardly anyone is studying the cheap unprofitable and obvious questions? Perhaps we need some government funded research that’s not driven by profits… oh. wait.? What happened to […]