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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.

Category: SARS-CoV-2

Masks matter for more than mandates

Posted onJuly 7, 2022July 26, 20222 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, SARS-CoV-2TagsInfectious dose, Plaque forming assay, TCID50

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, 20221 Comment

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

Arrr a piRATe

Arrrrr on the rise (Rhinovirus, RSV and RATs)

Posted onMarch 19, 2022March 26, 2022

Anecdotally there are a lot of acute respiratory virus infections ripping through the community where I live. Particularly noticeable in schools but also workplaces. Yes, there is SARS-CoV-2 among these Read More …

CategoriesRhinovirus, SARS-CoV-2, Transmission

Thank goodness we did all the work

Posted onJanuary 29, 2022July 16, 20226 Comments

Thank goodness we didn’t hold off on opening up to see what Omicron was capable of. We had to have Christmas. And there were national cabinet agreements. Anyway, how could Read More …

CategoriesAerosols, Communication, Coronavirus, COVID-19, Editorial, Enterovirus, Influenza, Parechovirus, Rhinovirus, SARS-CoV-2, Transmission

Living next door to Alice

Posted onJanuary 3, 2022July 24, 20222 Comments

I mean, who wants to say “living with COVID” amirite? The connotation is that it’s just a necessary thing we have to do. But really, at some point, it kind Read More …

CategoriesCoronavirus, COVID-19, SARS-CoV-2, Transmission

The Swiss cheese infographic that went viral

Posted onDecember 26, 2020November 15, 202233 Comments

A visual representation of how to prevent transmission of SARS-CoV-2 struck a chord with many in 2020. I won’t rehash all that has already been written about the Swiss cheese Read More …

CategoriesCommunication, COVID-19, SARS-CoV-2

The “false-positive PCR” problem is not a problem

Posted onNovember 22, 2020December 30, 202058 Comments

If you haven’t seen all the chatter that states PCRs using more than thirty-something (someone even suggested 25 to me!) cycles will suffer from false positives and so is useless, Read More …

CategoriesCoronavirus, COVID-19, PCR, SARS-CoV-2

More testing shows more iceberg

Posted onOctober 29, 2020November 3, 20205 Comments

COVID-19 case numbers are rising quickly in many parts of the northern hemisphere. Already some totals have outstripped the peaks seen in the first wave of the pandemic. Europe and Read More …

CategoriesCOVID-19, PCR, SARS-CoV-2

Yes, PCR tests can detect “the COVID virus”

Posted onAugust 4, 2020September 14, 2020113 Comments

I was asked to write some comments for a fact check article about some of the myths going around about PCR-based testing and whether PCR tests can detect “the COVID Read More …

CategoriesCommunication, Debunking, DNA, Laboratory methods, PCR, SARS-CoV-2TagsRT-PCR, RT-rPCR

We don’t yet know the origin story for SARS-CoV-2

Posted onMay 4, 2020May 4, 202025 Comments

By Katherine E Arden, PhD & Ian M Mackay, PhD The existence of a coronavirus related to severe acute respiratory syndrome coronavirus (SARS-CoV) was first hinted at by a researcher Read More …

CategoriesCOVID-19, SARS-CoV-2, Virus discovery

Kits and reagents and viruses

Posted onApril 12, 2020January 2, 202312 Comments

The COVID-19 pandemic has driven the use of the words “kit” and “reagent”. I completely feel for you if you still have no real idea of what is meant by Read More …

CategoriesCOVID-19, Laboratory methods, PCR, SARS-CoV-2

COVID-19 in Australia

Posted onMarch 9, 2020March 9, 202011 Comments

As the cases begin to build up – but are still pretty low with limited community spread having been detected – now is a good time to start watching where Read More …

CategoriesCoronavirus, COVID-19, Pandemic, SARS-CoV-2TagsAustralia, epidemiology

Past Time to Tell the Public: “It Will Probably Go Pandemic, and We Should All Prepare Now”

Posted onFebruary 23, 2020February 23, 2020330 Comments

by Jody Lanard and Peter M. Sandman NOTE FROM IAN: The expert risk communication team of Lanard and Sandman has given me permission to post their very well-considered reply to Read More …

CategoriesCommunication, COVID-19, SARS-CoV-2

Not so novel: numbers: around COVID-19 and SARS-CoV-2

Posted onFebruary 20, 2020March 28, 20202 Comments

A mammoth overview was just released by researchers from the China Center for Disease Control and Prevention (their website is a bit slow right now so have patience).[1] It broke Read More …

CategoriesCoronavirus, SARS-CoV-2, Virus discovery

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Recent Posts

  • ‘Endemic’ covers a lot of biology, but we’re probably not there yet for COVID-19 January 2, 2023
  • Whatever happened to communication? July 24, 2022
  • Masks matter for more than mandates July 7, 2022
  • An early & big flu rise in Australia June 7, 2022
  • BA.2.12.1 is on the rise in New York… May 2, 2022
  • Unexplained hepatitis: severe liver inflammation among young children April 25, 2022
  • Lockdowns had a role: they saved lives April 18, 2022
  • Super-cold or a silly headline? April 15, 2022
  • Arrrrr on the rise (Rhinovirus, RSV and RATs) March 19, 2022
  • Thank goodness we did all the work January 29, 2022
  • Living next door to Alice January 3, 2022
  • Ireland and the vaccinated hospitalised-it ain’t what it looks like November 6, 2021
  • WHO to new PCR users: read the damned manual! January 23, 2021
  • Putting PCR into real-time January 2, 2021
  • The mechanics of the polymerase chain reaction (PCR)…a primer December 28, 2020

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

  • ‘Endemic’ covers a lot of biology, but we’re probably not there yet for COVID-19
  • Whatever happened to communication?
  • Masks matter for more than mandates
  • An early & big flu rise in Australia
  • BA.2.12.1 is on the rise in New York…

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.

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Twitter: @mackayim

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