1. A #flu 🧵, based on U.S. data for the week ending Jan. 8.
There has been another pediatric death from flu, the third this season. It occurred in the week leading up to Christmas. Pediatric flu deaths are still at very low levels relative to regular flu years, thankfully.
2. #Flu activity is still at low levels & it actually dropped last week. Is that because of data filing delays over the holidays? Because people are avoiding health care because of Covid? Or is Omicron somehow crowding out flu? Need someone smarter than me to answer that Q.
3. Hospital admissions for flu decreased a little last week. That probably suggests some decline in #flu activity.
Will flu activity pick up again? Most flu seasons don't peak until late January, into February. The size of the Omicron wave, though, could be an influence here.
4. #Flu hospitalizations this year are very low, still, compared to pre-pandemic flu seasons. This year's rate so far is above last year's (almost no flu) & the very mild 2015-16 season. But it's far below most recent years.
5. A reason for that very low #flu hospitalization rate probably lies here. Only 1.3% of long-term care facilities reported having one or more flu cases among residents. In a regular flu season you'd see a lot more flu in LTCFs.
6. Virtually all the #flu viruses that have been typed in the U.S. so far this season have been H3N2 (a flu A virus). Activity around the country is sporadic, with some places reporting little (green) & others a lot (red). Check out ND, SD & Minn. How does that happen?
1. There is a new global flu report out from @WHO, so, a 🧵. #Flu activity is picking up globally after the historic low levels seen in the first year & a half of the #Covid19 pandemic. In some places, WHO says, activity is now at levels see before the pandemic.
2. @WHO didn't stipulate which countries are experiencing as much #flu now as they would have at a corresponding time of the year in the pre-pandemic era. I've asked & will add the info if I get it. It could be in parts of Europe. This from @ECDC_EU.
3. The global positivity rate for the period from Dec. 6 to Dec. 26 was 5.2%, which is above where it was in mid-March, 2020 when #flu activity worldwide collapsed.
The new rate is based on more than a half-million diagnostic tests conducted across 110 countries.
1. A flu 🧵, because it's Friday.
We're definitely into #flu season, but this is not like the flu seasons of yore. (Not yet, anyway.) Still, it's important to remember hospitals are overwhelmed with Covid. Flu on top of Covid is an additional stressor the system doesn't need.
2. Things appear to be heating up in many parts of the country, though this map charts influenza-like illness, which is more than just #flu. @CDCgov reports that the NE and Central parts of the country are reporting more #influenza than the west.
3. The data in this week's FluView covers the week ending Jan. 1. Reports from over the holidays can sometimes contain incomplete data, which may explain this week's test positivity rate, which is 3.8%. That's down from 6.2% the week before. I doubt flu is actually abating.
42. #ACIP member Pablo Sanchez, who has been one of the most vocal about his concerns about vaccine-associated myocarditis, is supportive of a *should* recommendation. To borrow a phrase from elsewhere: I've seen enough.
43. #ACIP member Keipp Talbot says "this booster will not be a hammer" becoz too many 12-15 yos aren't vaccinated at all.
"Boosters are incredibly important but they won't solve this problem of the crowded hospitals." Talbot thinks efforts should focus on getting kids dose 1 &2.
44. When #ACIP votes (probably in the next few minutes) it will be on a *should* recommendation.
Which means the vote will be about recommending kids 12-17 should get a booster. 16 & 17 yos are included because currently the recommendation for them is a *may* recommendation.
1. #ACIP is meeting this afternoon to discuss the recently @US_FDA authorization of Covid boosters for youths aged 12 to 15. I'll be live tweeting. The agenda is here cdc.gov/vaccines/acip/… and the meeting can be monitored here: video.ibm.com/channel/VWBXKB…
2. Slide presentations for today's #ACIP meeting can be found here, though most of them aren't yet up: cdc.gov/vaccines/acip/…
3. At present there are 13 of the 15 #ACIP voting members in attendance. Chair Grace Lee says others may join later. This meeting was set up at short notice and members have had to scramble — as they have multiple times through the pandemic — to clear time for this meeting.
1. A short #flu 🧵 @CDCgov posted flu data for the week ending Dec. 25 today. Flu activity continues to increase, but remains at lower levels than in pre-pandemic years.
Most diagnosed flu infections are in 5-24 year olds. Flu activity is highest in the east & central US.
2. Virtually all #flu activity so far has been caused by the #influenza A virus H3N2. That's too bad as it is the most problematic of (human) flu A & B viruses. There's a mismatch this year this year in the H3 component of flu shots. (Week 51, left column, season to date, right.)
3. For the week ending Dec. 25 (week 51), 6.2% of tests run by clinical labs were positive for flu. I think the last time it would have been that high was the week ending March 21, 2020 (6.9%), when the very active 2019-20 flu season ran smack dab into Covid — and promptly ended.
1. 🧵 @CDCgov has changed its recommendations about isolation & quarantine following infection or exposure to someone infected with #Covid19. The changes will involve a shortening of isolation/quarantine for most people.
2. People who contract #Covid19 should isolate for 5 days (formerly 10). If their symptoms have ended by then, they should wear a well-fitted mask when around others for 5 days.
If symptoms haven't ended at 5 days, isolation (followed by 5 days of masking) continues till they do.
3. Regarding quarantine: People who've been vaxed & boosted don't need to quarantine after exposure to someone who is infected with #Covid19. But they should wear a mask around others for 10 days after the exposure. And they should get tested 5 days after the exposure event.