Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Medicine · 1efd24fe Vaccines · 1efd24fe

Assessment

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.

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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

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)