A @CellCellPress commentary yesterday entitled "Keeping Pace with the #SARSCoV2 Variants" states
"The evidence so far suggests that effectiveness against hospitalizations and symptomatic illness is highly preserved against Delta" cell.com/cell/fulltext/…
I'm calling it out. /1
For several weeks dating back to July, we have seen protection of vaccination for symptomatic infections drop down from >90% to <40% in Israel which was refuted, attributed to poor analysis, Simpson's paradox, and many other objections to @IsraelMOH reports /2
Those reports were since corroborated by others including @KPSCalResearch, @PHE_uk. Qatar and many other. But they were ignored and denied. /3
Last week 3 @CDCMMWRgov reports highlighted the reduction of vaccination protection against hospitalization by 10-15 per cent points among people age 65+. Just as was seen in Israel. /4
This culminated in @TheLancet commentary this week by 2 FDA scientists, @WHO, and others
"To date, none of these studies has provided evidence of substantially declining protection against severe disease." That is pure denial. thelancet.com/journals/lance… /5
By ignoring/denying data, fully replicated by many independent reports, all that does is detract from public trust and discount the ability for people to process 2 messages:
1-Vaccines are extremely effective
2-A 3rd dose will be necessary in some to counter the effect of waning
Denialism about any hole in the vaccination story isn't going to get us anywhere. Tell the hard truths. Protect the vaccinated, who have needed to know about this issue since it first surfaced. The anti-vaxxers will distort everything; fear of feeding that is unfounded.
Along these lines, yesterday's CDC report of a statistically significant 14 per cent point drop (91>77) vs hospitalization after 4 months for Pfizer's vaccine, irrespective of age, is notable cdc.gov/mmwr/volumes/7…
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Delta can be daunting to contain.
The situation in Singapore with over 1,000 new cases today and yesterday, 80% of total population fully vaccinated, 1 of top 3 countries in the world, is an important indicator of the challenge.
Singapore’s booster campaign for people over the age of 60 began Tuesday, 14 September
2. 6-month follow-up of the original placebo-controlled trials (adult + teens; > 44,000 participants) showed gradual reduction in efficacy vs symptomatic infections from 96% (fully vaxxed) to 83% (> 4 months) nejm.org/doi/full/10.10…
3. Small 3rd shot-> Neutralizing antibody study vs Wild-type and Delta by age group, showing significant increase immune response not much affected by variant or age
The @Pfizer@US_FDA booster documents fda.gov/media/152161/d…
reviews all data on effectiveness (VE) vs infection
—waning immunity not related to Delta, just a matter of time, 6% reduction of VE every 2 months
—restoration to 95% VE by 3rd shot
—recommends booster for all age 16+
The (Pfizer) bottom line, w/ antibody % safety data in this 53 page report.
Their case is not made sufficiently for all age groups, predominantly relying on infections, not protection from severe illness, which exists now for age ≥ 60
That may change with ongoing follow-up data.
Little evidence of difference in booster effect by age or variant (WT/Wuhan vs Delta/DA)) difference for neutralization assays. Substantial increase on this log-scale NT50 plot across the board.
Let me be clear about the evidence on 3rd shots. It is unequivocal for Pfizer's vaccine, given w/ 3 week spacing. In people over age 60, there is significant reduction of effectiveness (VE) vs hospitalizations and symptomatic infections at 5+ months after primary vaccination. /1
And that Israel's data shows that VE vs severe illness is restored by a 3rd shot for those age ≥ 60.
The duration of the restored VE can be debated, but likely several months, at minimum. /2
It's not the "general population" but there are over 70 million Americans age ≥ 60. They should not be sitting vulnerable while infighting takes place /3 nytimes.com/2021/09/13/hea…
A new @TheLancet viewpoint by an international panel on boosters: "To date, none of these studies has provided evidence of substantially declining protection against severe disease." …s-jbs-prod-cdn.jbs.elsevierhealth.com/pb-assets/Lanc… But that'll change w/ this week's @NEJM Israel report, Pfizer💉, age >60
This is where I disagree w/ the panel. Many studies on reduced efficacy have been published in the media & preprints. Waiting for "robust data" that is adjudicated by the eminent authorities is not how it works. The public wants to know, has a right to know, and that builds trust
The data from 13 US jurisdictions to show some increase in breakthrough cases during Delta but, at the same time, increased gradient of benefit for vaccination and very little rise in the fully vaccinated for hospitalizations or deaths cdc.gov/mmwr/volumes/7…
The Table from the report on vaccine effectiveness from 9 state analysis for reduction in emergency department, urgent care, and hospitalizations cdc.gov/mmwr/volumes/7…