Mike Hoerger, PhD MSCR MBA Profile picture
Mar 11 25 tweets 8 min read Read on X
1) 5-yr Anniversary of the WHO Pandemic Declaration

🔥10 waves
🔥Covid mortality rivals lung cancer
🔥8 infections/person by 2030
🔥Long Covid as catastrophic
🔥Death trajectories becoming complex
🔥"During Covid" as anti-science rhetoric
🔥Serious ppl take Covid seriously
🧵
2) Wastewater-derived estimates of case rates show international consensus 20-26% of populations got Covid during the peak 2 months of the 2023-24 winter wave in the U.S., Canada, and the U.K.
3) The ratio of reported cases versus true cases has remained consistent, demonstrating the validity of wastewater-derived estimates. True cases are 15-30x reported cases, a consistent ratio. There are no examples demonstrating low case rates.
4) Misinformation is based on cognitive biases that steer people toward easy-but-bad data or lead them to overestimate their skills.

Disinformation can be blatant or grounded in specious pseudo-scientific arguments. Financial COIs are often the cause. Misinformation: Wastewater can’t predict cases  You can’t do that  “Streetlight effect,” “drunkard’s search,” or “McNamara fallacy”  “Dunning-Kruger fallacy”  Usually people w/expertise in adjacent or unrelated fields, or with clinical non-scientist backgrounds   Disinformation: Audacious lies: herd immunity, masks, tests, vaccines, air cleaning, surveillance Specious arguments: Whataboutism, amplifying trivial limitations, misrepresenting the CDC  Often serious Social/ Online Subscription & Ad Dollar Conflicts of Interest (SO SAD COIs)
5) Contrary to misinformation and disinformation, wastewater-derived estimates have a long history of publication on top scientific journals Example articles
6) The NYTimes shows that Covid continues to cause excess deaths, meaning it is killing hundreds of thousands of Americans in 2025.

Their estimates are overly simplistic but make the correct argument. See next few. NYT graph of excess deaths. Simple
7) More complex analyses of Covid excess deaths remain much too simplistic and often underestimate current Covid deaths. They do not account for "mortality displacement" -- the idea that so many have already died, we should be seeing fewer deaths by now. We're not. Our World in Data perpetuates bad Covid analyses that minimize Covid
8) Actuaries measure excess death correctly (or still slightly underestimate). They find Covid deaths are on par with lung cancer in 2025. Current excess death estimates using the best formulas show that under the "pessimistic" scenarios (similar to reality, if not lightly optimistic) Covid deaths are slightly higher than for lung cancer
9) The sources of Covid excess deaths are increasingly understood and paint a more pessimistic long-term trajectory, as demonstrated by (multi-systemic) non-respiratory deaths. Multi-systemic deaths on the rise, consistent with or surpassing more pessimistic scenarios.
10) The past and ongoing consequences of Covid will be marked by health disparities. Race, ethnicity, socioeconomic status, immigration status, LGBTQ. JAMA NO article on c19 disparities.
11) We are headed from nearly 4 Covid infections on average to 8 cumulative infections over the next 5 years if current trends hold. The Long Covid burden will be substantial.

Mitigating risk using multi-layered mitigation, like during the early pandemic, helps greatly. Line graph summarized in post
12) Nearly 5 million American adults have become disabled during the pandemic, with an ongoing linear trend because cumulative infections remain an ongoing burden.

We're doing almost nothing as a society to reduce infections. NYT graph
13) Children continue to become sick more frequently and more severely, with an increasing proportion missing multiple weeks of school.

So-called "lockdowns" don't case this. An annual Covid infection is the likely culprit. NYT graph
14) Younger adults are becoming disabled by Covid, though often still working. Women are particularly burdened. >1 million female workers <65 have become disabled during the pandemic
15) Though at a slower clip, male workers <65 years old are also becoming disabled by Covid.

>1 million female workers <65 have become disabled during the pandemic >0.5 million male workers <65 have become disabled during the pandemic
16) Older adults are dropping out of the workforce. 2.0-2.7 million so far, so-called "excess retirements" graph summarized in post
17) Covid deaths are less and less about acute deaths and more and more about complex non-acute death trajectories. Graphs of 4 prototypical death trajectories.
18) An example of a Covid cumulative reinfection death trajectory. Complex death trajectory, stairstep decline with c19 infections, with superimposed organ damage.
19) I have no idea what people mean by "during Covid" - a useless and anti-science concept. "During Covid" as the early pandemic
20) #DuringThePandemic is today. 10 covid waves, each labeled during the pandemic
21) #DuringCovid is today. 10 covid waves, each labeled as during covid
22) "During Covid" is anti-science offensive nonsense.

We don't say during car accidents, during lung cancer, or during diabetes to describe the onset or any time point of these public health problems. graphs of covid, car accidents, lung cancer, and diabetes, with "during" labels for the onsets
23) Many people are "high risk," simply based on known evidence, albeit imperfect. Many more are high risk based on unknown or undiagnosed factors. Most should assume a high risk family member or that high risk themselves. Estimated >50 million Americans with known high risk
24) NIH has required universal masking in 48 clinical centers for >4 months because they lead on healthcare. info from nih website
25) Over 75% of PMC Covid Dashboard viewers note using 4 layers of mitigation (masks, vax, tests, air quality) in the past 6 months. 95% use at least 3 out of 4 layers. described in post

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More from @michael_hoerger

Oct 21
PMC COVlD Update, Oct 20, 2025 (U.S.)

SARS-CoV-2 transmission has fallen.
🔹1 in 191 (0.5%) actively infectious
🔹"Lull" levels at 20% of the summer peak
🔹255,000 new daily infections (still concerning)

Many will knock out higher-risk activities the next 2-4 weeks.
🧵1/11 Graph of the 11 waves, shows current lull.
PMC COVlD Update, Oct 20, 2025 (U.S.)

"Lull" transmission remains dangerous:
🔹1.8 million estimated new weekly infections
🔹>90,000 estimated new #LongCOVID conditions from this week's infections
🔹>500 excess deaths to result from this week's infections

🧵2/11 Infections						 Proportion Actively Infectious										1 in 191 (0.5%) New Daily Infections										 255,000  Infections the Past Week										 1,800,000  Infections in 2025										 191,000,000  Cumulative Infections per Person										 4.69  										 Long COVID										 Long COVID Cases Resulting								13,000 to 51,000		   from New Daily Infections										 Long COVID Cases Resulting								90,000 to 360,000		   from New Weekly Infections										 										 Excess Deaths										 Excess Deaths Resulting 									70 to 120	   from New Daily Infections										 Excess Deaths ...
PMC COVlD Update, Oct 20, 2025 (U.S.)

Exposure risk during "lull" transmission remains high when engaging in many social interactions.

Interacting with 25 people yields a 12% chance of exposure. 100 people? 41% chance of exposure, assuming no testing/isolation.

🧵3/11 Number of People		Chances Anyone is Infectious		 1				0.5% 2				1.0% 3				1.6% 4				2.1% 5				2.6% 10				5.1% 15				7.6% 20				10.0% 25				12.3% 30				14.5% 50				23.1% 75				32.5% 100				40.8% 200				64.9% 300				79.2%
Read 11 tweets
Oct 11
PMC COVlD Wave Update (Europe)
11 October 2025 🧵

The PMC website includes an international directory of websites with COVlD wastewater monitoring. It is more up to date than the directories of the EU and WHO.

Let's review what's happening in Europe...

1/ world map, nations with surveillance shown in blue. URL says pmc19.com/global
Data in #Austria show a rising COVlD wave. The x axis (bottom) has infrequent labels, but the data shown go through October 8th.

Find more here:

2/ pmc19.com/austrialongitudinal graph
COVlD levels have been percolating in #Belgium, with "moderate" levels overall.

The transmission pattern is similar across regions. Plants at Namur-Brumagne and Oostende report "high" levels.



3/ pmc19.com/belgiumheat map and longitudinal graph
Read 20 tweets
Oct 5
PMC COVlD Update, Week of Oct 6, 2025 (U.S.)
🧵1/9

An estimated 1 in 81 people are actively infectious during the ongoing 11th wave.

The "shutdown" has created a blackout at the state level.

Transmission is half that of the peak one month ago, and we anticipate a relative national "lull" in early-to-mid November, albeit still at dangerous levels.

Our model uses a combination of CDC and Biobot data, so we are able to estimate national statistics despite the CDC data going offline. On the map, note that Puerto Rico continues to update; they use a CDC-style system but were dropped by the CDC long ago. For full methodology, review the technical appendix on the website.Heat map, grayed out. 1 in 81 estimated actively infectious, or 602,000 new daily infections, per wastewater-derived estimates.
PMC COVlD Update, Week of Oct 6, 2025 (U.S.)
🧵2/9

#DuringCOVID is today. We estimate >600,000 new daily infections. This is about half the peak on September 6.

Notice current levels are similar to the estimated peaks of the first 3 waves. 11 wave graph
PMC COVlD Update, Week of Oct 6, 2025 (U.S.)
🧵3/9

Weekly estimates:
🔹4.5 million infections
🔹>200,000 resulting long-term health conditions
🔹>1,300 resulting excess deaths Infections						Oct 6, 2025				pmc19.com/data Proportion Actively Infectious										1 in 81 (1.2%) New Daily Infections										 602,000  Infections the Past Week										 4,540,000  Infections in 2025										 189,000,000  Cumulative Infections per Person										 4.69  										 Long COVID										 Long COVID Cases Resulting								30,000 to 120,000		   from New Daily Infections										 Long COVID Cases Resulting								227,000 to 910,000		   from New Weekly Infections										 										 Excess Deaths										 Excess Deaths Resulting 									170 to 280	   from New Daily Infe...
Read 9 tweets
Oct 3
BREAKING: 3 State Pharmacy Boards Still Block COVlD Boosters without a Prescription

ACIP voted against prescriptions for boosters & 47 states + DC follow that guidance.

Georgia, Missouri, & Louisiana require prescriptions.

Key points in my letter to the pharmacy boards. 🧵1/7 Map shows only Missouri, Louisiana, and Georgia are blocking residents from routing COVlD boosters unless they have a prescription.
Georgia law indicates that the pharmacy board is to follow ACIP. They do not dictate further nuance. Georgia continues to require prescriptions, going against the spirit of the law, ACIP, and 47 other states.

🧵2/7 Georgia:  State law does NOT require a prescription if it is a “vaccine that is included on the adult immunization schedule recommended by the Advisory Committee on Immunization Practices (ACIP)”1 ACIP voted against prescriptions, and 47 states have accepted that schedule.  The law does not mention a CDC Director sign-off, which may be delayed months. Act now to save lives.  1. https://law.justia.com/codes/georgia/title-43/chapter-34/article-2/section-43-34-26-1/
Louisiana law tells the pharmacy board to follow ACIP. ACIP says do not require a prescription, and 47 other states agree.

The Louisiana pharmacy board continues to require a prescription.

🧵3/7 Louisiana:  State law does NOT require a prescription if the “vaccine is administered in conformance with the most current immunization administration protocol as set forth by the United States Centers for Disease Control and Prevention Advisory Committee on Immunization Practice.” 2 ACIP voted against prescriptions, and 47 states have accepted that protocol.  The law does not mention a CDC Director sign-off, which may be delayed months. Act now to save lives.  2. https://law.justia.com/codes/louisiana/revised-statutes/title-37/rs-37-1218-1/
Read 7 tweets
Oct 1
I remember when they said kids don't transmit COVlD much because they are short, small, and have tiny lungs. They lied.
I remember when they said COVlD doesn't transmit in schools. They lied.
I remember when they said COVlD is mild in kids without understanding post-acute sequelae. They lied.
Read 25 tweets
Sep 30
PMC COVlD Update, Sep 29, 2025 (U.S.)

Summary: COVlD is everywhere.

On the back end of this unprecedented 11th wave, "times they are a-changin." In particular, COVlD levels are shifting north and east.

Notice that few states are in the highest and lowest categories. Much of the south and west have considerable transmission post-peak. Many places in the north and east are seeing steady or increasing transmission after relatively lower levels.

Overall, levels are lower than the past few weeks, but transmission remains considerable. Those relying on anecdata (friends, coworkers, and family infected) may increasingly realize we are in a wave.

We estimate nearly 750,000 new daily infections nationwide, meaning approximately 1 in 66 people or 1.5% are actively infectious.

These estimates are derived by linking wastewater levels to IHME true case estimates using methodology commonly employed worldwide, detailed on the website, noted in a pre-print. Many publications in leading medical journals link wastewater data to key metrics that matter, noted in the online technical appendix.

In this week's report, we note adding North Dakota and Puerto Rico to the heat map in support of health equity. We have been imputing ND levels since the launch of PMC 3.0 using data from neighboring states. PR continues to report qualitative levels using the CDC format but is not longer included on the CDC website.

1/8 🧵heat map based on CDC data, and PMC case estimates
PMC COVlD Update, Sep 29, 2025 (U.S.)

State-level prevalence estimates, AL to MS. The levels use CDC labels, which tend to have an optimistic portrayal of risk. For example, CO is listed at "low" (by our estimate 1.5% infectious).

#MaskUp at 1.5% if having lapsed.

2/8 🧵 Alabama	High	1 in 33 (3.0%) Alaska	Low	1 in 69 (1.5%) Arizona	Moderate*	1 in 42 (2.4%) Arkansas	High	1 in 38 (2.7%) California	High	1 in 36 (2.8%) Colorado	Low	1 in 69 (1.5%) Connecticut	Very High	1 in 18 (5.6%) Delaware	Very High	1 in 24 (4.1%) District of Columbia	Low	1 in 81 (1.2%) Florida	Low	1 in 62 (1.6%) Georgia	Low	1 in 101 (1.0%) Guam	Very Low	1 in 130 (0.8%) Hawaii	Moderate	1 in 53 (1.9%) Idaho	Low	1 in 62 (1.6%) Illinois	Moderate	1 in 60 (1.7%) Indiana	High	1 in 27 (3.8%) Iowa	Moderate	1 in 58 (1.7%) Kansas	Low	1 in 78 (1.3%) Kentucky	Moderate	1 in 39 (2.6%) Louisiana	High	1 in 3...
PMC COVlD Update, Sep 29, 2025 (U.S.)

State-level prevalence estimates, Missouri to Wyoming.

New York had *huge* retroactive upward corrections, and is now "High," as many residents hypothesized.

Note, Puerto Rico only provides CDC qualitative levels, so no data.

3/8 🧵 Missouri	Very Low	1 in 156 (0.6%) Montana	High	1 in 37 (2.7%) Nebraska	High	1 in 27 (3.8%) Nevada	Very High	1 in 15 (6.6%) New Hampshire	Moderate	1 in 59 (1.7%) New Jersey	Low	1 in 82 (1.2%) New Mexico	Low	1 in 102 (1.0%) New York	High	1 in 35 (2.8%) North Carolina	High	1 in 35 (2.9%) North Dakota	High*	1 in 34 (3.0%) Ohio	Moderate	1 in 58 (1.7%) Oklahoma	Low*	1 in 81 (1.2%) Oregon	High	1 in 32 (3.1%) Pennsylvania	Low	1 in 61 (1.6%) Rhode Island	High	1 in 33 (3.1%) South Carolina	Moderate	1 in 40 (2.5%) South Dakota	High	1 in 28 (3.5%) Tennessee	Low	1 in 75 (1.3%) Texas	Moderate	1 in 48 (2....
Read 8 tweets

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