State of the Pandemic
Posted: Fri Jul 15, 2022 6:59 pm
It's Friday, which is the day that the CDC updates its data on which variant is currently making folks sick. Not surprisingly, it's Omicron from sea to shining sea. BA.5 continues to dominate the rankings, having almost eliminated BA.2 from contention. The CDC estimates that 65% of new infections are BA.5, followed by BA.12.2.1 (17%) and BA.4 (16%). So far, no sign of the new dark horse sub lineage BA.2.75, which appears to have originated in India.
BA.4 and BA.5 are more transmissible than other Omicron sub-lineages because they have evolved to escape antibody protection that resulted from being infected with an earlier strain or vaccination based on earlier strains. Tricksy little devil, this virus.
So, how are we doing in terms of transmission and hospitalization? The CDC generates two charts to help individuals assess their risk (as "public health" has been replaced by "private health). One is Community Community Levels, a risk assessment largely based on hospitalization rates, but taking into account transmission rates. Here's this chart from the beginning of May, when we'd recovered from the big Omicron surge at the end of 2021 and early 2022.

With the exception of New England, which I think had BA.12.2.1 surging at the time, the country looks pretty good. With few exceptions, Community Levels were low. Yay us!
Here's the same map for today:

That's the difference BA.5 makes, when combined with pretending that the pandemic is over. Here are the CDC's recommendations based on this map:

Personally, I wear a mask in public, indoor spaces when my county is yellow or orange. The CDC recommends for orange. When my county is orange, I simply avoid public indoor spaces altogether, as well as crowded outdoor spaces.
Before these maps, the CDC used what it called Community Transmission maps, which were based on testing and the rate of positivity of tests. The CDC still keeps them up to date, but discourages the public from using them. Here is what that map looked like in early May:

Looks quite a bit different from that green, safe looking map that the CDC encourages the public to use. Note, the CDC's version does not include purple and brown. That was added by an epidemiologist to show gradations within the red, which is the CDC's color for the high end of transmissions.
For example, here is today's Community Transmission Map from the CDC:

And here's the same map with the brown and purple colors added:

And here is what the colors represent:

So, what does it all mean? It means that transmission has increased substantially across the U.S. since the spring due to B.5 sub-lineage. If it seems like everyone you know is getting COVID for the first time (or second or third), it's because they are. BA.5 is so good at immune evasion, if you're going into public indoor spaces without a mask, you're very likely to get infected. And, while your case may be mild, you have no control over who you spread it to. That's shown by the increase in COVID-19 hospitalizations.
The whole idea of the "it's over strategy" was to protect the vulnerable and let the rest of us live "normal" lives. How's that going?

Given that age is an important vulnerability, it looks like we're putting the old folks back in the hospital.
The good news is that, while BA.5 and other Omicron sublineages are good at escaping antibody immunity, they aren't so good at escaping T-cells. That seems to be why vaccinator protection against infection declines over time, but the protection against serious illness and death persists. Still, COVID-19 is still killing over 400 people a day in the U.S. I'd like to avoid being one of them.
Sources:
CDC Variant Tracker:https://covid.cdc.gov/covid-data-tracke ... roportions
CDC Community and Transmission Level Trackers: https://covid.cdc.gov/covid-data-tracke ... -type=Risk
CDC Community Transmission with augmented high end range:https://covid19florida.mystrikingly.com
NYT Hospitalization by age tracker:https://www.nytimes.com/interactive/202 ... cases.html
BA.4 and BA.5 are more transmissible than other Omicron sub-lineages because they have evolved to escape antibody protection that resulted from being infected with an earlier strain or vaccination based on earlier strains. Tricksy little devil, this virus.
So, how are we doing in terms of transmission and hospitalization? The CDC generates two charts to help individuals assess their risk (as "public health" has been replaced by "private health). One is Community Community Levels, a risk assessment largely based on hospitalization rates, but taking into account transmission rates. Here's this chart from the beginning of May, when we'd recovered from the big Omicron surge at the end of 2021 and early 2022.

With the exception of New England, which I think had BA.12.2.1 surging at the time, the country looks pretty good. With few exceptions, Community Levels were low. Yay us!
Here's the same map for today:

That's the difference BA.5 makes, when combined with pretending that the pandemic is over. Here are the CDC's recommendations based on this map:

Personally, I wear a mask in public, indoor spaces when my county is yellow or orange. The CDC recommends for orange. When my county is orange, I simply avoid public indoor spaces altogether, as well as crowded outdoor spaces.
Before these maps, the CDC used what it called Community Transmission maps, which were based on testing and the rate of positivity of tests. The CDC still keeps them up to date, but discourages the public from using them. Here is what that map looked like in early May:

Looks quite a bit different from that green, safe looking map that the CDC encourages the public to use. Note, the CDC's version does not include purple and brown. That was added by an epidemiologist to show gradations within the red, which is the CDC's color for the high end of transmissions.
For example, here is today's Community Transmission Map from the CDC:

And here's the same map with the brown and purple colors added:

And here is what the colors represent:

So, what does it all mean? It means that transmission has increased substantially across the U.S. since the spring due to B.5 sub-lineage. If it seems like everyone you know is getting COVID for the first time (or second or third), it's because they are. BA.5 is so good at immune evasion, if you're going into public indoor spaces without a mask, you're very likely to get infected. And, while your case may be mild, you have no control over who you spread it to. That's shown by the increase in COVID-19 hospitalizations.
The whole idea of the "it's over strategy" was to protect the vulnerable and let the rest of us live "normal" lives. How's that going?

Given that age is an important vulnerability, it looks like we're putting the old folks back in the hospital.
The good news is that, while BA.5 and other Omicron sublineages are good at escaping antibody immunity, they aren't so good at escaping T-cells. That seems to be why vaccinator protection against infection declines over time, but the protection against serious illness and death persists. Still, COVID-19 is still killing over 400 people a day in the U.S. I'd like to avoid being one of them.
Sources:
CDC Variant Tracker:https://covid.cdc.gov/covid-data-tracke ... roportions
CDC Community and Transmission Level Trackers: https://covid.cdc.gov/covid-data-tracke ... -type=Risk
CDC Community Transmission with augmented high end range:https://covid19florida.mystrikingly.com
NYT Hospitalization by age tracker:https://www.nytimes.com/interactive/202 ... cases.html