Claim Raven explanation
What this means
This statute addresses a tropical-disease presumption in the peacetime compensation framework. It includes service-length, manifestation, and rebuttal provisions, while preserving other evidence-based routes to service connection.
Section 1137 changes which presumptive rules apply to qualifying service after December 31, 1946. The six-month language here should not be applied to a later-service claim without checking that cross-reference.
How this helps your claim
Start with the service dates and the diagnosed tropical disease. Then match the medical timeline with the presumption that actually governs the period of service.
What to check in your records
Use your decision, examination reports, and relevant records to check the following points.
- Confirm the service dates and applicable statutory framework.
- Gather diagnosis, symptoms, and medical evidence about the disease's incubation period.
- Review the decision's treatment of section 1137 and other supported service-connection routes.
Check service dates before using the tropical-disease rule
The section contains a particular peacetime presumptive framework, but section 1137 affects which rules apply to qualifying service after its stated date. Determine the actual service period before treating the service-length or manifestation language here as controlling.
Keep the diagnosed disease, manifestation evidence and service history separately documented. A tropical location alone does not establish a listed disease or its timing. The cross-reference and the disease-specific provisions are part of the same analysis rather than optional background reading.
Does the six-month language apply to every later-service claim?
No. The statute must be read with section 1137, which directs use of other presumptive provisions for qualifying later service. Do not transfer an isolated service-length requirement without checking that relationship. The governing rule depends on the actual statutory framework for the period involved.
Official statutory text
38 USC § 1133
OLRC release through Public Law 119-102 (July 12, 2026). Layout and spacing are adapted for reading. The statutory text is shown here; publisher source credits and editorial notes remain in the linked official release.
§ 1133. Presumptions relating to certain diseases
(a) For the purposes of section 1131 of this title, and subject to the provisions of subsections (b) and (c) of this section, any veteran who served for six months or more and contracts a tropical disease or a resultant disorder or disease originating because of therapy administered in connection with a tropical disease, or as a preventative thereof, shall be deemed to have incurred such disability in the active military, naval, air, or space service when it is shown to exist within one year after separation from active service, or at a time when standard and accepted treatises indicate that the incubation period thereof commenced during active service.
(b) Service-connection shall not be granted pursuant to subsection (a), in any case where the disease or disorder is shown by clear and unmistakable evidence to have had its inception before or after active military, naval, air, or space service.
(c) Nothing in this section shall be construed to prevent the granting of service-connection for any disease or disorder otherwise shown by sound judgment to have been incurred in or aggravated by active military, naval, air, or space service.
Related references
- 38 USC § 1131: Peacetime disability compensation eligibility
- 38 USC § 5107: Benefit of the doubt in VA claims
- 38 CFR § 3.159: VA duty to assist: records and examinations
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