Stage-2 Infected: SHRIEKER

Threat Level: 🔴 CRITICAL
Infection Stage: Advanced
First Documented: Sector 7, Day 14
Specimens Recorded: 1,247

Overview

Stage-2 infected, colloquially known as "Shriekers," represent an advanced mutation of the quarantine zone pathogen. These entities pose an extreme threat to all personnel.

Physical Characteristics

Attribute	Description
Height	1.8-2.1m (increased from baseline)
Weight	70-85kg (muscle atrophy, bone density increase)
Skin	Pale gray, visible veins, minor lesions
Eyes	Milky white, no pupil response
Auditory Signature	95-120 dB scream (3-5 second bursts)

Behavioral Analysis

Hunting Pattern

Nocturnal Activity: 85% of encounters occur between 20:00-06:00
Pack Behavior: Travel in groups of 3-7 specimens
Territorial Range: ~500m radius from nest site

Scream Mechanism

The signature "shriek" serves multiple purposes:

Echolocation: Navigating dark environments
Communication: Alerting nearby infected
Disorientation: Stunning uninfected targets

WARNING: Prolonged exposure (>10 seconds) can cause:
- Temporary hearing loss
- Disorientation
- Increased heart rate
- Panic response

Combat Protocol

Recommended Engagement

Distance: Minimum 20m
Weapon: High-caliber firearms (7.62mm or above)
Target: Center mass or cranial region
Squad Size: Minimum 3 personnel

Contraindicated Actions

❌ Melee combat
❌ Solo engagement
❌ Pursuit into enclosed spaces
❌ Non-lethal deterrents

Specimen Analysis

Autopsy Report #S2-0147

Date: 2025-11-03
Location: Research Lab Delta
Examiner: Dr. Helena Cross

Key findings:

Rapid muscle degeneration in extremities
Hypertrophied vocal cords (3x normal size)
Brain tissue shows 70% degradation in frontal lobe
Pathogen concentration: 10^8 CFU per gram of tissue

Field Notes

Encountered a pack of 5 Shriekers in Sector 7B. Used flashbang grenades to disorient before eliminating targets. Recommend adding flashbangs to standard loadout.
— Lt. Marcus Wei, Delta Squad

Stage-2 Infected: Shrieker