Helen Branswell πŸ‡¨πŸ‡¦ Profile picture
Jan 21, 2022 β€’ 5 tweets β€’ 4 min read β€’ Read on X
1. A #flu 🧡 based on US data from @cdcgov.
Two children died from flu in the week ending Jan. 15, bringing to 5 the total number of pediatric flu deaths so far this season. It's a such a shame to see this feature of flu season return.
2. #Influenza-like illnesses dropped again last week. The further we get out from the holidays, the more likely it is that's a real thing, not an artifact of reporting delays. Is the Omicron wave crowding out flu? Are measures people are taking to avoid Omicron driving down flu?
3. #Influenza-like illness activity (which is #flu, RSV & a range of other non-Covid respiratory pathogens) is incredibly variable this year. It's unusual to see some areas reporting very little (green) & others lots (deep red). In a regular flu season, it's more homogeneous.
4. There isn't as much #flu circulating as in a normal season. What is out there is pretty much exclusively #H3N2, a type of #influenza A virus.
5. You can see FluView, @CDCgov's weekly #flu update, here: cdc.gov/flu/weekly/

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More from @HelenBranswell

Jun 22
1. Some thoughts on #H5N1 #birdflu in cows. A 🧡
A bunch of new herds were announced by a couple of states today β€”Β Colorado and Iowa. The former reported +5 & looks like it may have another pending; It now has 18 in total, maybe 19. Iowa reported 2 more, taking it to 10.
2. To the best of my ability to keep up β€”Β and that's being challenged β€” I think there have been 125 herds reported in 12 states since the end of March. This graph combines @USDA's numbers from yesterday with the newly reported herds from Colorado & Iowa. Image
3. But @USDA threw a wrench into the works today. It updated its exceedingly wonky #H5N1 #birdflu in cows landing site. Some things work better, but the cumulative number of herds was lowered by 4 (from yday) with no explanation. USDA now says 112 herds in 12 states. Image
Read 8 tweets
Apr 26
1. @USDA posted an FAQ today about the federal order restricting movement of dairy cattle infected with
#H5N1 #birdflu. Interesting information therein.
A 🧡
New to me: USDA says 8 poultry operations in 5 states have had poultry outbreaks with the virus detected in cows. Image
2. Minnesota hasn't reported #H5N1 #birdflu in cattle, but it has had at least 1 poultry outbreak with the cattle virus, @USDA reveals. More evidence, probably, that the virus is far more widely spread than has been realized. The FAQ is here: aphis.usda.gov/sites/default/…
3. The federal order on the movement of dairy cows goes into effect 4/29. @USDA is setting what looks like an ambitious timeline for processing of tests, especially "non-negative" tests that must then go for confirmatory testing at the USDA lab in Ames, Iowa. #H5N1 #birdflu Image
Read 7 tweets
Apr 25
1. Listening to an @ASTHO - @IDSAInfo - @CSTEnews webinar on #H5N1 #birdflu in cows.
Of interest so far:
β€” @USDA is monitoring feral swine; no detections of H5 so far.
β€” in the "small number" of samples tested to date, doesn't look like cows are shedding virus thru feces.
2. @USDA Rosemary Sifford said the infections are "mostly" being seen in lactating herds.
1 herd was found to be positive despite the fact there were no clinical signs among the cows.
Sifford said USDA doesn't yet know how long infected cows shed virus.
#H5N1 #birdflu
@USDA 3. Sonja Olsen from @CDC says there've been 6 infections detected in cats on dairy farms. Not sure I've seen the exact number. #H5N1 #BirdFlu
Read 16 tweets
Apr 19
1. A 🧡 on #flu, #Covid & #RSV (mostly flu). The
#influenza-like illness season is pretty much over. The percentage of people seeking care for ILIs is below 2.9%, that dotted line. You can catch flu at any time of the year, but chances of catching it now thru the summer are low. Image
2. It's not just #flu. #Covid activity now is at low levels nationally and #RSV activity has declined to the point where @CDCgov says the season is ending. Hallelujah.
cdc.gov/respiratory-vi…
Image
3. It hasn't been a particularly bad #flu season, but the estimated number of hospitalizations for flu has been pretty high β€” one of the highest in recent years. (red line) The 2017-18 season, which was harsh, was worse. CDC estimates there were 370K hospitalizations this year. Image
Read 5 tweets
Feb 9
1. A 🧡on #flu & #Covid activity trends based on reports today from @CDCgov. Most of the data is for the week ending Feb. 3. The #influenza-like illness (ILI) season seems to have peaked at the end of Dec, with declines in flu, Covid & #RSV since then. But the season isn't over. Image
2. There was a bit of an uptick in #flu activity in the central & south central US. It corresponds with an increase in flu B detections there. Pre-Covid, flu B often arrived in a late season wave. We may see that again this year.
Map on left is the week ending 1/27; right is 2/3.
Image
Image
3. An additional 8 pediatric #flu deaths were reported to @CDCgov in the wk ending 2/3. The season's death toll in kids now stands at 74, which is awful, obviously, but not as bad as most years pre-Covid. But if there's a lot of flu B activity, this number could climb. Image
Read 5 tweets
Jan 5
1. Traditionally I've done #flu updates on Fridays, but given our new reality β€” #Covid is here to stay β€” & the expansion of data on @CDCgov's website, I'm going to broaden the scope going forward. Top line news: Lotta illness out there right now.
cdc.gov/respiratory-vi…
2. Most parts of the country are ensconced in #influenza-like illness season right now. (Minn, what are you doing to stay so healthy?) This graphic doesn't just represent #flu activity; #Covid, #RSV & other ILIs are also captured here. @CDCgov's FluView: cdc.gov/flu/weekly/
Image
3. #Flu is the most common bug making people sick right now, but there's a lot of #Covid going around too. (I know from recent experience.) #RSV is still fairly active but declining. This breakdown of what's causing most illness is seen both in positive tests & ER visits.
Image
Image
Read 7 tweets

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