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
3) The ratio of reported cases versus true cases has remained consistent, demonstrating the validity of wastewater-derived estimates.
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.
5) Contrary to misinformation and disinformation, wastewater-derived estimates have a long history of publication on top scientific journals
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.
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.
8) Actuaries measure excess death correctly (or still slightly underestimate). They find Covid deaths are on par with lung cancer in 2025.
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.
10) The past and ongoing consequences of Covid will be marked by health disparities. Race, ethnicity, socioeconomic status, immigration status, LGBTQ.
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.
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.
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.
14) Younger adults are becoming disabled by Covid, though often still working. Women are particularly burdened.
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
16) Older adults are dropping out of the workforce. 2.0-2.7 million so far, so-called "excess retirements"
17) Covid deaths are less and less about acute deaths and more and more about complex non-acute death trajectories.
18) An example of a Covid cumulative reinfection death trajectory.
19) I have no idea what people mean by "during Covid" - a useless and anti-science concept.
20) #DuringThePandemic is today.
21) #DuringCovid is today.
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.
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.
24) NIH has required universal masking in 48 clinical centers for >4 months because they lead on healthcare.
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.
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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
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
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.
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/
Data in #Austria show a rising COVlD wave. The x axis (bottom) has infrequent labels, but the data shown go through October 8th.
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.
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.
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
Key points in my letter to the pharmacy boards. 🧵1/7
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
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.
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 🧵
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 🧵
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.