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Virology Down Under

Facts, data, info, expert opinion and a reasonable, occasionally grumpy, voice on viruses: what they are, how they tick and the illnesses they may cause.

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The ridiculously oversimplified claim that PCR can “detect one single molecule”

The ridiculously oversimplified claim that PCR can “detect one single molecule”

There’s so much more to these four words than is attributed to them, so I thought I’d better write that down instead of leaving it in my head. Here’s hoping Read More ...

Looks like Flu has reset in Australia

Looks like Flu has reset in Australia

The COVID-19 pandemic introduced a brand-new respiratory virus, SARS-CoV-2. With that introduction, as suspected, lots of things were thrown into disarray. One of those was the circulation of other respiratory Read More ...

Just 0.7% of of universally screened asymptomatic patients produced unrepeatable PCR tests

Just 0.7% of of universally screened asymptomatic patients produced unrepeatable PCR tests

A recent paper entitled “Diagnostic Value and Outcomes of Systematic SARS-CoV-2 Screening in Asymptomatic Patients” highlights the need for innovative contextual actions in response to positive PCR results during exceptional Read More ...

Age and COVID-19: What’s with all the young kids?

Age and COVID-19: What’s with all the young kids?

Inspired by an online conversation and the hard work of others, I set off to examine age groupings among Australians confirmed as COVID-19 cases, based on testing using a quality-laboratory Read More ...

Update on Monkeypox virus (MPXV) transmission in Australia

Posted onAugust 6, 2024February 17, 2026

Monkeypox virus (MPXV) causes MPOX. A ‘global outbreak’ of infections and disease became noticeable in 2022. The MPOX outbreak continues, and below is an update on the ongoing MPOX cases Read More …

CategoriesMPOXTagsDemocratic Republic of the Congo, DRC, MPXV

More PCR cycles don’t mean magic results

Posted onAugust 5, 2024February 13, 2025

The quote below has been circulated for a while, amplified by those with no PCR understanding. Its focus is to make you believe that too many PCR cycles create false Read More …

CategoriesCOVID-19, Debunking, PCRTagsPCR

words in dictionary

Stop Hijacking Definitions To Farm Anger And Clicks!

Posted onDecember 29, 2023February 9, 2025

It’s a funny old time to be a scientist. Advances are being made as ever, and new knowledge around airborne virus infection and transmission is accruing like never before. Not Read More …

CategoriesCommunication, COVID-19, Definition

From PIXABAY

What is “Immunity Debt”?

Posted onDecember 2, 2023July 30, 20253 Comments

Something called “immunity debt” has been in the news quite a bit lately. Most recently, because of what looks like a multicountry Mycoplasma pneumoniae epidemic, but before then, in the Read More …

CategoriesCOVID-19, Immunology

A diagram of a filamentous RSV virion.

Respiratory syncytial virus (RSV) in Australia – worth not(ify)ing

Posted onAugust 27, 2023August 27, 2023

Once upon a time, we grew viruses from sick patients’ samples. This took an age, failed often, had low throughput and was not a good diagnostic tool. Then we developed Read More …

CategoriesRSV, Testing

Vote Yes in the 2023 voice to Parliament referendum.

I’m voting YES to the Voice to Parliament.

Posted onAugust 8, 2023August 9, 20232 Comments

Because the First Nations people of Australia deserve to have the privileges the rest of us take for granted and, at the very least, be the source of truth on Read More …

CategoriesCommunication

Excess deaths align with COVID-19

Posted onMay 7, 2023May 7, 20232 Comments

There are minimisers who spread misinformation, like butter on hot toast. And yes, it can sink in and spread further. One of these piles of melted fat ridiculously claims that Read More …

CategoriesCOVID-19, Epidemic, Influenza

Variation is key to the SARS-CoV-2 ‘waves’

Posted onMay 7, 2023May 7, 2023

Just a short note to highlight that viruses changing their ‘look’ through selection and expansion of variants in response to our immune system’s pressure on their evolution has been the Read More …

CategoriesCOVID-19, Vaccines & vaccination, VariantsTagsepidemic

person holding injection

The 2023 southern hemisphere influenza vaccine

Posted onApril 29, 2023July 13, 2023

Each year we get a new vaccine for each hemisphere. The design gets settled six months out, and sometimes a lot can change in that time. So how does the Read More …

CategoriesInfluenza, Vaccines & vaccination

young annoyed female freelancer using laptop at home

‘Endemic’ covers a lot of biology, but we’re probably not there yet for COVID-19

Posted onJanuary 2, 2023January 2, 2023

Right up front, I’m going to repeat myself by saying that I think COVID-19 will become a disease that has endemic as well as epidemic states at some point in Read More …

CategoriesCommunication, COVID-19, Endemic, Influenza, Picornavirus, Transmission, VariantsTagsCOVID-19, disease, endemic, influenza, pandemic

Whatever happened to communication?

Posted onJuly 24, 2022July 25, 20222 Comments

I’m not an expert in many things. But I’m enough of a scientist to conclude with confidence that what’s happening now with COVID-19 in Australia and in many other countries Read More …

CategoriesCommunication, COVID-19, Pandemic

Masks matter for more than mandates

Posted onJuly 7, 2022July 1, 20253 Comments

The amount of virus per amount of snot, air, monkey or whatever is a way to describe the concentration of virus present in that thing. It might seem intuitive to Read More …

CategoriesAerosols, COVID-19, Masks, Rhinovirus, SARS-CoV-2TagsInfectious dose, Plaque forming assay, TCID50

An early & big flu rise in Australia

Posted onJune 7, 2022June 8, 2022

Influenza (flu) cases have been rising rapidly in Australia this year. Some see this as a result of waning immunity during our border closures. Some see this as the harbinger Read More …

CategoriesInfluenza

NEXTSTRAIN Clades, 02MAY2022

BA.2.12.1 is on the rise in New York…

Posted onMay 2, 2022May 2, 2022

A recently named sub-strain represents the latest twist in the ongoing evolution of SARS-CoV-2. It’s currently active in the United States and looks to be very capable of spreading, outpacing Read More …

CategoriesCOVID-19, SARS-CoV-2, Variants

Unexplained hepatitis: severe liver inflammation among young children

Posted onApril 25, 2022May 11, 20222 Comments

Uncharacterised and so far rare cases of unexplained severe liver inflammation among young children. These cases of unexplained hepatitis have been appearing in elevated numbers worldwide since November 2021. The Read More …

CategoriesAdenovirus, Emerging disease, SARS-CoV-2, Uncategorized

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Recent Posts

  • Looks like Flu has reset in Australia June 5, 2026
  • The ridiculously oversimplified claim that PCR can “detect one single molecule” May 26, 2026
  • Just 0.7% of of universally screened asymptomatic patients produced unrepeatable PCR tests May 2, 2026
  • A little virus that still can: poliovirus and poliomyelitis May 1, 2026
  • Age and COVID-19: What’s with all the young kids? April 14, 2026
  • Asymptomatic, acute and persistent COVID-19 symptom changes over the course of three infections March 5, 2026
  • How are asymptomatic COVID-19 cases tracking? March 2, 2026
  • Another way to look at flu season size February 28, 2026
  • Whooping cough in 2024 was huge in Australia, but is declining in 2025 and 2026 February 19, 2026
  • Pathology lab PCR is not research lab PCR January 27, 2026
  • Is there more flu in Australia and New Zealand than normal for Christmas? Hell Yes! December 27, 2025
  • Catch them all? There are three different influenza viruses and they can co-circulate each season August 22, 2025
  • The “Infection Pause”: because it’s about fewer infections, not an immune debt to repay July 31, 2025
  • A Flunami in July July 27, 2025
  • COVID-19 is a Pandemic: What if it was a Pandemic Emergency? And what are they anyway? July 24, 2025

All opinions are my own and do not represent medical advice or the views of any institution.

All graphics made by me are free-to-use. Please just cite the particular page, blog and me. A heads-up would be nice, but that can happen later.

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Recent Posts

  • Looks like Flu has reset in Australia
  • The ridiculously oversimplified claim that PCR can “detect one single molecule”
  • Just 0.7% of of universally screened asymptomatic patients produced unrepeatable PCR tests
  • A little virus that still can: poliovirus and poliomyelitis
  • Age and COVID-19: What’s with all the young kids?

All opinions are my own and do not represent medical advice or the views of any institution.

All graphics made by me are free-to-use. Please just cite the particular page, blog and me. A heads-up would be nice too but that can happen later.

Bluesky: @mackayim.bsky.social

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Virology Down Under

Facts, data, info, expert opinion and a reasonable, occasionally grumpy, voice on viruses: what they are, how they tick and the illnesses they may cause.

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