Menu

Primary Menu

Skip to content
  • Home
  • About Me
  • Ebola index
  • MERS Numbers
Show Header Sidebar Content

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, 20223 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, 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

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, 2020August 5, 202458 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 are 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, 2020114 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, 2020331 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

More of VDU

  • Pinterest
  • Google
  • Facebook
  • Mastodon

Recent Posts

  • What if Harvard loses? April 19, 2025
  • Measles takes your immune memories April 9, 2025
  • A measles infographic: virus, symptoms and white blood cells March 27, 2025
  • United States influenza: biggest season in 15 years of data February 18, 2025
  • No new A/H7N8 chook farms hit in Victoria so far February 17, 2025
  • The US 2024-2025 flu season and the vaccine February 13, 2025
  • A good news RSV vaccine story for adults February 5, 2025
  • Japanese encephalitis virus (JEV) in Australia – a 2022 study and the current state January 29, 2025
  • Not the “Chinese flu” label thing again…please January 6, 2025
  • SNAPDATE: MPOX cases in Australia, 14.09.2024 September 14, 2024
  • In Australia, COVID-19 deaths may have stopped decreasing September 6, 2024
  • It takes a while to gather death data September 5, 2024
  • Update on Monkeypox virus (MPXV) transmission in Australia August 6, 2024
  • More PCR cycles don’t mean magic results August 5, 2024
  • Stop Hijacking Definitions To Farm Anger And Clicks! December 29, 2023

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.

Tags

anti-vaccination asymptomatic Australia avian influenza China Democratic Republic of the Congo DRC Ebola virus Ebola virus disease epidemic epidemiology EVD Flu flunami flu season genotype H1N1 H3N2 H7N9 HTLV HTLV-1c influenza influenza virus MERS MERS-CoV molecular epidemiology outbreak PCR pneumonia Queensland reporting respiratory virus rhinovirus RT-PCR SciComm science communication seasonal influenza social media SoMe summer transmission United States of America vaccine Wuhan Zaire ebolavirus

Regular reads…

  • FluTrackers-everything infectious, before it happens
  • Mike Coston’s Avian Flu Diary
  • Crawford Kilian’s infectious disease blog
  • Pathogen perspectives: Ebola and more
  • ProMED mail
  • WHO Disease Outbreak News
  • HealthMap
  • STAT News
  • CIDRAP-timely infectious disease reporting
  • Maia Majumder’s blog
  • Kai Kupferschmidt
  • Martin Enserink
  • EpiRamblings

 

Recent Posts

  • What if Harvard loses?
  • Measles takes your immune memories
  • A measles infographic: virus, symptoms and white blood cells
  • United States influenza: biggest season in 15 years of data
  • No new A/H7N8 chook farms hit in Victoria so far

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.

Mastodon: @[email protected]

Twitter: @mackayim

Copyright © 2025 Virology Down Under. All Rights Reserved.
• The following link is used to verify that I 'own' the domain
for use with Mastodon
Theme: Clean Box Pro
Scroll Up
  • Home
  • About Me
  • Ebola index
  • MERS Numbers