Most of us have already had a case of COVID

From the Johns Hopkins daily health newsletter:

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US SEROPREVALENCE 

A study published April 26 in the US CDC’s Morbidity and Mortality Weekly Report (MMWR) estimates that 58% of the US population, including 75% of children, have been infected with SARS-CoV-2. Many of those infections occurred during the winter’s Omicron surge. The study reports on data from national commercial laboratories across all 50 states, Washington, DC, and Puerto Rico. Between September 2021 and February 2022, labs conducted convenience samples on blood specimens that were submitted for clinical testing in their labs, excluding samples that were testing for SARS-CoV-2 antibodies upon initial receipt. The median sample size for the group of labs was 73,869 each month, with a drop in the number of tests to 45,810 in February 2022, likely caused by disruptions from the surge in domestic infections fueled by the Omicron variant. The research team weighted samples by demographic data to produce estimates of seroprevalence. 

The team saw a slight, but steady, increase in seroprevalence between September and December 2021, increasing between 0.9-1.9% every 4 weeks. At the end of this collection period, the seroprevalence across the US sample was estimated to be 33.5%. Between December 2021 and February 2022, at the height of the Omicron surge, the team observed a spike in national seroprevalence, rising from 33.5% to 57.7%. Notably, during this period, children aged 0-11 saw an increase from 44.2% to 75.2% and those aged 12-17 saw a similar increase from 45.6% to 74.2%. Adult populations saw spikes in seroprevalence from 36.5% to 63.7% for individuals aged 18-49, 28.8% to 49.8% for those 50-64, and 19.1% to 33.2% among those aged 65 and older. The researchers noted several limitations in their study design, including restrictions of applicability tied to convenience sampling; limited race and ethnicity data; the potential for sampling bias due to the setting of sample collection; and the possibility that infection following vaccination resulted in reduced antibody titers.  

SARS-CoV-2 testing is only able to catch a fraction of cases occurring in the country, so serosurveys present an opportunity to better understand the scale of infections. Still, the study may not represent a full picture of COVID-19 in the country, nor does it indicate whether or not individuals with SARS-CoV-2 antibodies have persistent immunity to new infections. CDC Director Dr. Rochelle Walensky noted the study’s results and vaccine uptake show an increased level of community protection from SARS-CoV-2. She added that vaccination remains key in creating a more resilient population, urging those who remain unvaccinated, including those previously infected, to get vaccinated. 

Vaccines Save Lives. (Duh.)

This graph from today’s NYT shows why.

Was the COVID risk overblown?

I have seen people claim that COVID wasn’t any worse than the flu, and that the toll from the disease was smaller than the number of people killed in traffic accidents each year.

Is that correct? Sources of data on deaths from all kinds of causes are easy to find. I will limit myself to the US.

Let’s see:

Today’s WorldOMeter says the US has had 666,627 deaths since the start of this pandemic, starting almost exactly 18 months ago (mid-March of 2020 to 9/7/2021).

That number of deaths, divided by 18 months, works out to a monthly death toll from COVID of about 37,000 per month.

Flu, however, takes roughly a full year to kill that many.

If we multiply the 37 thousand by 12 months, you get 444,000 killed by COVID in a year.

Flu’s Toll over the Past Decade

The CDC says that up to but not including the pandemic, influenza has inflicted, per year:

between 9 million and 45 million illnesses

between 140,000 and 810,000 hospitalizations

between 12,000 and 61,000 deaths (so by WorldOMeter’s numbers, COVID has been between 6 and 37 times more deadly)

Traffic deaths

For automobiles, the annual death rate had been about 36,000 people killed per year (up until 2019, and not including any pandemic months)

So COVID is more deadly than traffic accidents of all sorts by a factor of about 12 to one if we use WorldOMeter’s data.

Covid’s Toll

Now let’s compare those figures with the ones from COVID. I think you will see that COVID has been in fact much more dangerous.

Over the past 18 months, the CDC (as opposed to WorldOMeter) says we have had:

120.2 Million Estimated Total Infections (this includes both those who did NOT have any symptoms, as well as those who DID; this can’t really be compared to the figures for the flu)

101.8 Million Estimated Symptomatic Illnesses (since this is more than a year, to be fair, we should adjust by a factor equal to the ratio of 12 months to 18 months, or 2/3. Doing so, I get about 67 million symptomatic COVID infections per year, which is between 2 to 6 times larger than for the flu!)

6.2 Million Estimated Hospitalizations (adjusting as before, this is like 4 million hospitalizations per year, which is between 5 and 29 times worse than the flu)

767,000 Estimated Total Deaths (this is like 511,000 deaths per year – between 8 and 43 times worse than the flu!)

So, those arguments are full of nonsense, to put it politely.

The risk was NOT overblown.

I wish everybody in the US and abroad was permitted to take the vaccine, and did so!

I want this to be over.

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My sources were:

https://www.cdc.gov/flu/about/burden/index.html regarding influenza

https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burden.html for COVID-19

https://www.iihs.org/topics/fatality-statistics/detail/yearly-snapshot for automobiles

https://www.worldometers.info/coronavirus/country/us/#graph-deaths-daily for WorldOMeter’s estimates