Claim

An MIT-developed lipid nanoparticle formulation kept RNA vaccine particles stable at room temperature for up to one year or at 37°C (98°F) for two months.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 13455 · qualifiers {"population":"RNA vaccine particles in the reported formulation; the immune-response test was in mice."}

a conjunction joins clauses that may be separately evaluable

Referenced 145 times: checked 3, looked up by assistants 0, viewed 86, shared 56. A count of attention, not evidence.

Topics

Medicine · 1efd24fe Vaccines · 1efd24fe

Assessment

Supported

Score: 0.9955 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

4 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:f87b7afb-1da3-8032-a1de-4ae80171cfbc

Not yet independently audited.Evidence points both ways.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from news.mit.edu was not found on the page when Galedra fetched it.

Why?

Strongest counted support: MIT reports one-year room-temperature or two-month 98°F storage stability and equivalent immune responses in mice after storage. weight 2.000000 evidence

Strongest counted contradiction: An independent 2026 study of four liquid mRNA-LNP formulations found degradation at 5°C and complete transfection loss at 25°C within six months. weight 0.200000 evidence

Suppressed as dependent: The passage directly states that the formulation remained stable at room temperature for one year or nearly 100 degrees Fahrenheit for two months.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

Hide calculation

0.9955 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 5 sources, 4 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:eeceb4e2f14160ac99fbf834d5c6792ff9b0e53d4273eac0b6cb7e998036dba4

Last changed at entry seq 15625; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
b8f37cd0 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000
3a751c49 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
9659b432 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept b8f37cd0)
4873dbe3 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
243cba70 contradict	relevance WEAK 0.2 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.200000	0.200000

prior 0.50 → log-odds 0.000000 + 5.400000 (the counted weights) = 5.400000 → probability 0.9955

Under neighbouring settings of the same model: 0.9777 to 0.9991, a spread of 0.0214.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“An MIT-developed lipid nanoparticle formulation kept RNA vaccine particles stable at room temperature for up to one year or at 37°C (98°F) for two months.” · 1 claim · 29 September 2026
“An MIT-developed lipid nanoparticle formulation kept RNA vaccine particles stable at room temperature for up to one year or at 37°C (98°F) for two months.” · 1 claim · 28 September 2026
“MIT researchers developed an AI-optimized lipid nanoparticle formulation that kept RNA vaccine particles stable at room temperature for a year or at 98°F for...” · 2 claims · 28 September 2026

Evidence for

MIT reports one-year room-temperature or two-month 98°F storage stability and equivalent immune responses in mice after storage.

From New formulation helps RNA vaccines withstand high temperatures Read 2026-09-28 Relevance DIRECT Steps 0 Counted

The passage directly states the storage durations and temperatures.
The passage directly states that the formulation remained stable at room temperature for one year or nearly 100 degrees Fahrenheit for two months.

From New formulation helps RNA vaccines withstand high temperatures Read 2026-09-28 Relevance DIRECT Steps 0 Counted
The peer-reviewed study reports 100% bioactivity after more than two months at 37°C in solid-state formulations using clinically relevant LNP compositions.

From Accelerated discovery of thermostable mRNA–lipid nanoparticle vaccines using data-efficient AI Read 2026-09-28 Relevance DIRECT Steps 0 Counted

Peer-reviewed primary study corroborates the high-temperature stability result, with the reported two-month duration.
The primary study reports 100% bioactivity after over two months at 37°C and non-inferior immune responses in rodents and nonhuman primates.

From Accelerated discovery of thermostable mRNA–lipid nanoparticle vaccines using data-efficient AI Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Independent primary article corroborates the heat-stability result while specifying the tested animal populations and solid-state formulation.

Evidence against

An independent 2026 study of four liquid mRNA-LNP formulations found degradation at 5°C and complete transfection loss at 25°C within six months.

From Identifying Key Factors Affecting mRNA-Lipid Nanoparticles Drug Product Formulation Stability Read 2026-09-28 Relevance WEAK Steps 0 Counted

This challenges generalizing room-temperature stability across LNP formulations, but it does not directly test MIT’s distinct formulation or disprove its reported result.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
d2b94ec5		b8f37cd0

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	b8f37cd0, 3a751c49, 9659b432, 4873dbe3, 243cba70

Summary

Supported. The main support is: MIT reports one-year room-temperature or two-month 98°F storage stability and equivalent immune responses in mice after storage. 04d99f90

Against that, contradiction: An independent 2026 study of four liquid mRNA-LNP formulations found degradation at 5°C and complete transfection loss at 25°C within six months. 9c76b1c0

1 further item repeats the same origin and is not independent evidence. d2b94ec5

A search for evidence in the opposing direction found something; see the counted evidence. 4cd94050

Review checks: 1 of 4. coverage:f87b7afb-1da3-8032-a1de-4ae80171cfbc

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
13455	APPENDED
13456	ACCEPT	AUTOMATIC_AFTER_VALIDATION
13465	LINK_EVIDENCE	by 1efd24fe (accepted)
13470	TASK_RESULT	by 1efd24fe (accepted)
13478	LINK_EVIDENCE	by 1efd24fe (accepted)
13885	TASK_RESULT	by 1efd24fe (accepted)
15624	LINK_EVIDENCE	by 1efd24fe (accepted)

Score trace

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