This Sources Sought Notice is for market research only, does not constitute a solicitation, and does not obligate the Government to award a contract. The VA Caribbean Healthcare System in San Juan, Puerto Rico, is seeking qualified businesses under NAICS 621511 (Medical Laboratories; size standard $41.5 million) capable of providing the Karius next-generation sequencing infectious disease blood test. The contractor must supply specimen transport materials and handling instructions, maintain specimen integrity, provide a communication channel for pending-test inquiries, and return secure electronic test results within established timeframes. Interested concerns should submit a qualifications letter with company/contact information, SAM UEI, socio-economic category, capability statement, and relevant past performance. Prospective offerors must be registered in SAM, and responses should be emailed to the listed contract specialist; telephone and facsimile responses will not be considered.