the cdc finally admitted covid goes year-round.
that's a big deal because up to now the cdc
pretended covid is a winter respiratory disease.

since covid appeared, the cdc has treated it
as a "seasonal" disease. it has been one of the
most basic (mis)understandings the cdc has had.

in this thread, i show you that was wrong, and
cdc had more than enough evidence to know it.
it is a long thread, since i have lots to show.

if you would rather read the thread on the web
instead of here on twitter, you can find it here:
http://zenmagiclove.com/covid-seasonal.html

in epidemiology-speak, a "seasonal" disease
is one that's most prevalent for a couple months
(generally cold-weather, november to february).

after this high prevalence, a "seasonal" disease
largely disappears for the rest of that year;
thus it might be absent for roughly 8 months.

so when the cdc deemed covid "seasonal",
the dishonest implication of that term was that
covid would largely disappear for most of the year.

the inference the cdc wanted americans to draw
is that we had to fret about covid in winter,
but could forget about it the rest of the time.

the problem with that is that scads of people
saw that covid was not "largely disappearing"
for "most of the year". it was here, constantly.

and again, the cdc has maintained that charade
for four full years of the covid experience, so
this has been an ongoing sore-point for many.

so this is a big deal, that the cdc
admitted covid isn't "seasonal".
it finally relented to those who'd
called out its dishonesty all along.

the cdc made this announcement quietly,
mounting that webpage on july 3rd, 2024,
so burying it from the press on the eve of
a 4-day weekend.

it is only now, 4 years into covid, that the cdc
admits something that has been very obvious
if it had only looked at one of its own graphs.

for all 4 years of covid, the cdc deaths graph
shows 2 peaks per year, plainly visible to all:
one in the summers, the other in the winters.

(i'll be using cdc graphs on covid deaths here
in the thread, even though deaths are an unduly
limited way to assess damages done by covid.)

(but i use cdc death graphs because they
are one of the only constant measures kept.
others (cases, hospitalizations) have been
turned off.)

thus now calling covid an "unpredictable" virus
is just a different way to gaslight us, since
there are indeed spikes, that come in seasons.

we have covid peaks in both winter and summer.
(and no, in case you wondered, that does not
mean covid is "seasonal", as typically defined.)

for those of us trying to surf the covid waves,
it's useful to have a good grasp of them, and
after 4 years of them, we can see the pattern.

indeed, one quite specific pattern emerges.
as with anything in nature, there is variability.
but this pattern is robust, and remarkably so.

it is basically one big wave per year,
or might as well be.
to show this wave,
i'll use a graph of the last 365 days,
as it does a fine job.

this wave starts on the 4th of july (purple),
sits on a plateau for 2 months in fall (yellow),
then rises up to a peak in mid-january (red).

after hitting that annual mid-january peak,
the wave declines in winter and spring (cyan),
and levels at its trough at spring's end (green).

thus, we have our wave, from start to finish.
the rise is july through january, the second half
the year. the decline is half the next year.

i'll show you covid has this pattern each year
(albeit at different levels) but we will start by
looking at the data for calendar year 2023.

(we're looking at the data from january 2023
though december 2023, so we get the last half
of one wave and the first half of the next wave.)

you see the peak, on 1/7/23.
then the decline, afterward, is steady and fast;
uninterrupted, it's easy to see,
down to the trough on 7/8/23.

the decline of the wave is very straightforward.
the deaths per week go down week after week,
from peak to trough. it's quite uncomplicated.

the next yearly wave starts in summer.
its peak will come next winter, but the rise to it
isn't as steady as the decline from the last peak.

the start of the yearly wave is always
a surge beginning in summer.
and the wave's peak always results from
a surge that comes in late-fall.

you might be asking yourself why i talk about
"one yearly wave" at the same time i talk about
"two surges" and "two spikes" and "two peaks".

the answer is easy:
there are indeed 2 yearly peaks:
summer and winter,
but the summer peak never declines back
to the level it starts from.

indeed, as this data here for 2023 shows you,
sometimes the summer spike does not decline
back at all. it sits flat on a plateau for months.

this means that the winter surge
always starts from a much higher level
than the summer surge.
which is part of the reason it peaks highest.

but also, contrary to the summer cycle,
the winter cycle always declines to a lower level
than it started from (i.e., to the annual trough).

one way to think about this
that makes it clear is that
you get the one yearly wave
when you stack the winter surge
on top the summer surge.

or, for any mountain climbers here,
the summer spike takes us up to
our autumn base-camp, where we stay
until we make our wintertime summit.

we can see this by looking, again, at
the data starting in summer 2023 and
continuing for 366 (leap-year) days
until the end of spring 2024.

here you see the yearly wave nicely highlighted.
it rises from the 2023 trough (7/8/23), to its
peak (1/13/24), to the 2024 trough (6/8/24).

but between the spike at the start of summer
and the spike in late fall, we have that plateau
in fall for two months (october and november).

some people think the summer surge is smaller.
not always. in 2023, the summer surge rose from
~5k to ~15k deaths; autumn went ~15k to ~25k.

in 2022, the summer surge was a similar size
(nearly exactly) to the fall surge that followed.
(because that summer surge did decline back.)

so one more wrinkle:
we have one (1) yearly wave,
composed of two (2) annual surges,
which are the result of
three (3) superspreader events.

there are 3 yearly covid
superspreaders in the u.s.
the first is the 4th of july.
the second one is thanksgiving.
and the last is christmas.

the first is the primary source of
the summer surge. always.
and the last two are the genesis of
the fall surge. always. we can count on it.

it comes as no surprise that these occasions
are three of the biggest travel holidays in the u.s.
and are associated with family gatherings.

when folks gather from various locations and
socialize freely and comfortably with each other,
it maximizes the damage any sick can inflict.

when you have family events, everybody knows
everybody else, so everybody interacts closely,
and even one ill person might infect everybody.

this is why events like marriages or funerals
are superspreaders, because close interactions
happen, even between people who live far apart.

then of course you have the airports to navigate:
baggage-check, t.s.a., and the plane itself,
crammed for hours next to unmasked strangers.

the 4th of july produces the summer surge.
every week in july, after the 4th of july,
shows increased weekly deaths.
every week. every year.

that's cdc data for covid deaths in july
for every year since 2020.
(the 2024 data hasn't come in yet.)
every single week shows an increase.

every week in july, after the 4th,
your number of covid deaths for that week
increases over the week before it.
that is a surge. every year.

of course we know intuitively that
the 4th of july is a superspreader.
but here we see evidence for it,
unequivocally exhibited in the data.

the summer surge is amazingly predictable.
yet it seems to take many people by surprise.
every year they're just amazed covid is still here.

the 4th of july is 2 weeks after summer starts.
the summer surge will often last all summer,
until fall starts, toward the end of september.

the summer surge typically reaches a plateau
lasting through october and most of november,
until the 4th thursday in november, thanksgiving.

thanksgiving, a big weekend family gathering,
is the second dependable covid superspreader;
you can bet on a spike in covid deaths after it.

indeed, just like the rise after the 4th of july,
every week from thanksgiving to christmas has
seen a rise in deaths every year since 2020.

and if the thanksgiving weekend starts a wave,
we know quite well a long holiday period from
pre-christmas to post-new year will prolong it.

and yes of course it does. the spike continues
for 2-3 weeks after christmas up to its peak;
it's so regular you can set the calendar by it.

you saw it every year.
covid deaths rose each week in july after
the 4th of july, and again each week
from thanksgiving through mid-january.

i told you i would show you that this pattern
presents itself in every year of the pandemic,
so here is the data for the 2021 calendar year.

and here it is for 2022. again, a sharp decline,
to the annual trough, then the summer spike
starting the next wave, a plateau, then a peak.

and here is the season-based 2023 breakdown.
(seasons are a nice way to split up the year, but
aren't too different from the calendar year.)

the other aspect is the winter/spring decline.
it is easy to see on the graphs, so no surprise
that the data also supports it unequivocally.

what we see is that the pattern has been
repeated throughout the entire pandemic,
right up to the summer surge we're now
experiencing today.

what is important for us to remember is that
these are not equinox/solstice "seasons" per se.
they have nothing to do with cold/hot weather.

(this is not to say that cold weather does not
contribute to transmission. but it is clearly
not the sole factor, or even the most crucial.)

these are "holiday seasons", human events
where people-gathering is a vital component.
these are dates we know are coming, and
exactly when.

this pattern has manifested itself clearly in
every single one of the 4 years of covid, and
it is high time for the cdc to stop ignoring it.

so, i'll repeat, to call covid "unpredictable" is
an attempt by the cdc to dodge responsibility
for the fact they've botched their job here.

(it is disingenuous to blame the summer surge
on "new variants" or "decreasing immunity" too,
because those factors are present year-round.)

covid has laid down a solid pattern which is
extremely predictable, and linked to actions
that are entirely within our abilities to control.

can we tell people that they shouldn't gather
on the 4th of july, thanksgiving, and christmas?
maybe. maybe not. but we can do other things.

first, we can (and we should) inform them that
their gatherings have consequences which are
completely predictable, and quite discomforting.

we need to make these surges salient to people,
put them in the spotlight, make people confront
the reality, the senseless repetitive cycle.

second, we can (and we should) put in place
measures to help mitigate those consequences.
the best time to stop a spike is before it starts.

mandating masks in airports on busy travel days
is common sense, and a properly-informed public
would support such a rule if it is enforced.

(polling as recent as one from last month shows
that a majority of people support mask mandates;
we want action to stop the endless surges.)

again, the time to stop a spike is at its start.
we know that the 4th of july always creates a
summer surge, so that is when we can stop it.

and we know that thanksgiving and christmas
also cause a big spike. it's not "winter" per se.
(january is usually just as cold as december.)

the fact that the annual peak, yearly, always
arrives 2-3 weeks after the christmas holiday
is a testament that our behavior is responsible.

it is the humans gathering that causes spikes.
our superspreaders cause big infection chains.
even if we did not know it, the data tells us.

the notion that we cannot do anything to stop
these waves of the covid rollercoaster is simply
ridiculous. we can do something. and we must.

most of all we've gotta slap some sense into
the cdc. it's abdicated its responsibilities and
does little more than gaslight the public now.

even when the cdc actually tries to "come clear"
on some issue, they cannot make a clean break.
this "seasonal" confession is far too messy.

there are other problems with its webpages,
and we should mention them, briefly, before we
end this thread, to let the cdc know we see them.

for example, the cdc used its other webpages
to propagate its droplet dogma, instead of the
more scientifically-validated airborne approach.

the "hygiene" mention (i.e., hand-washing) is
an implicit reference to the droplet philosophy;
its presence here is an embarrassing anomaly.

and facemasks have been relegated
to an "additional strategies" mention,
not the "core prevention" they should
have for an airborne disease.

finally the cdc webpage makes reference to
"respiratory illnesses" but scientific consensus
is now that covid is more of a vascular disease.

so, again, to promulgate such an outdated and
limited view of covid's wide-ranging effects on
the body is an embarrassment to public health.

so there are still problems with
the cdc approach to covid, 4 years in,
as seen on its webpages, but
let's cheer this victory on "seasonal".