For a hospital lab doing rapid infectious disease testing, the “best” immunoassay platform depends on your test menu, needed turnaround time, and volume. In practice, the strongest choices usually fall into a few categories:

1) Automated chemiluminescent immunoassay (CLIA / CMIA / ECLIA)

Best for: high-throughput hospital core labs
Use cases: HIV, hepatitis B/C serology, syphilis, CMV, EBV, SARS-CoV-2 serology, respiratory viral antigen in some systems, procalcitonin, and other infection-related markers

Why it’s strong

• Fast turnaround once loaded
• High throughput and good sensitivity
• Well-suited for continuous workflow and batching flexibility
• Excellent for routine infectious disease serology and antigen testing

Examples of platforms

• Abbott Alinity / ARCHITECT (CMIA)
• Roche cobas e / e 801 / e 402 (ECLIA)
• Siemens Atellica IM / ADVIA Centaur (CLIA)
• DiaSorin LIAISON (CLIA)

2) Rapid point-of-care lateral flow immunoassays

Best for: emergency department, urgent care, isolation units, bedside testing
Use cases: influenza, RSV, COVID-19 antigen, group A strep, malaria, HIV screening in some settings

Why it’s strong

• Very fast: usually 10–30 minutes
• Minimal instrumentation
• Ideal for triage decisions and isolation management

Limitations

• Lower sensitivity than molecular tests, especially early or low-burden infections
• Performance can vary by operator and specimen quality

3) Microfluidic cartridge-based immunoassays

Best for: moderate-throughput rapid testing with simple workflow
Use cases: some respiratory antigens, multiplex panels, POC-style hospital testing

Why it’s strong

• Small footprint
• Automated handling
• Faster than traditional lab immunoassays in some workflows

Examples

• Certain integrated analyzer systems that use cartridge or cassette formats

4) Multiplex immunoassay platforms

Best for: when you need several targets from one sample and want efficient workflow
Use cases: respiratory panels, arboviruses, syndromic testing in some assay formats, immune response profiling

Why it’s strong

• Can test multiple analytes simultaneously
• Good for larger hospitals and reference labs

Caveat

• Not always the fastest for true “STAT” use
• More often used for efficiency than immediate bedside turnaround

5) Digital immunoassays / ultra-sensitive immunoassays

Best for: detecting low-abundance antigen targets or early infection markers
Use cases: specialized viral antigen or biomarker testing

Why it’s strong

• Very high sensitivity
• Useful when conventional immunoassays are borderline

Caveat

• Less common in routine hospital rapid testing
• Higher cost and narrower menu

---

Practical recommendation by hospital use case

If you want the best all-around core-lab platform:

Choose an automated CLIA/CMIA/ECLIA analyzer from a major vendor.
These give the best balance of:

• speed
• assay menu breadth
• sensitivity/specificity
• workflow automation
• QC/connectivity

If you want the fastest actionable result near the patient:

Choose rapid lateral flow or cartridge-based POC immunoassays, especially for:

• influenza
• RSV
• COVID-19
• strep A
• malaria

If your goal is respiratory pathogen triage:

A common approach is:

• rapid antigen immunoassay first for immediate decisions
• NAAT/PCR confirmation when sensitivity matters or the antigen test is negative but suspicion is high

---

Key factors to compare before buying

1. Turnaround time
2. Analytical sensitivity/specificity
3. Menu breadth
4. Throughput
5. Sample types accepted
6. Hands-on time and staffing
7. CLIA waiver / POC usability
8. Interface with LIS/EHR
9. Reagent stability and cold chain needs
10. Cost per reportable result

---

Bottom line

• Best for central hospital labs: automated chemiluminescent immunoassay platforms
• Best for rapid bedside decisions: lateral flow POC immunoassays
• Best for efficient multi-target testing: multiplex or cartridge-based systems

If you want, I can also give you a side-by-side comparison of specific platforms like Roche vs Abbott vs Siemens vs DiaSorin, or tailor recommendations for ED, microbiology, or core lab workflows.