Mobile devices are among the most frequently handled objects in clinical workflows, yet studies repeatedly show they can carry clinically relevant bacteria.
A healthcare worker's phone travels with them. It goes into a patient room, onto a nursing station, into a break room, and back again. Along the way it is picked up, set down, spoken into, and handed off. Unlike hands, it is rarely cleaned between those moments.
WHO hand-hygiene guidance explicitly treats objects in a patient's immediate surroundings as contamination-relevant touchpoints. CDC guidance on environmental cleaning highlights high-touch surfaces in healthcare settings as a specific concern. The phone sits squarely in both categories, yet it falls outside most cleaning protocols.
Organism identification sourced from published reviews and studies on healthcare worker mobile phone contamination.
Illustrative representation. Organisms identified in published studies on HCW mobile phone contamination.
Shared desk phones in hospital environments are handled repeatedly across shifts and users with little consistency in cleaning between contacts. The WHO reports that office phones carry an average of 25,127 bacteria per square inch, and standard surface cleaning cannot reach microbes living deep inside the handset holes.
In a controlled hospital-based study, disposable barrier covers were evaluated on shared desk phones over a 48-hour period. The difference between protected and unprotected devices was substantial.
The reduction was statistically significant (Chi-square, p <0.05), supporting the role of continuous barrier-based protection in limiting microbial contamination on shared communication devices.
Dominant organisms identified included gram-positive bacteria such as Staphylococcus species, common healthcare-associated pathogens.
Source: Cadenas Cedeño O. Effectiveness of a Protective Barrier Cover Against Microorganisms in Units Used in Hospital Environments. HULA-IA and IVSS, Mérida, Venezuela. Office for the Integral Attention of the Biomedical Scientific Researcher (OIA-BSR), 2021.
Infection control protocols in healthcare settings have evolved considerably, yet mobile devices remain a persistent gap. Current approaches for managing phone contamination rely on behavioral compliance, intermittent use, or passive policy , each with practical limitations in active clinical environments.
| Approach | How It Works | Limitation in Practice | Protection Type |
|---|---|---|---|
| Disinfecting Wipes | Manual surface cleaning between uses or at end of shift | Requires consistent staff compliance; protection is temporary and degrades quickly with subsequent handling | Intermittent |
| UV Sanitizers | UV-C light chambers disinfect devices at fixed stations | Impractical during active care; phones leave the sanitizer and re-enter the clinical environment immediately | Point-in-Time |
| Cleaning Policies | Institutional guidelines require staff to clean devices regularly | Difficult to audit or enforce consistently; adherence varies by shift, unit, and workload pressure | Policy-Dependent |
| Sterra Cover | Single-use disposable barrier applied before use and discarded after | No reliance on cleaning behavior or compliance; protection is continuous for the duration of use | Continuous Barrier |
Sterra was designed to address this gap with continuous, single-use protection No behavior change required, no compliance to audit.
WHO hand-hygiene guidance treats objects in a patient's immediate environment as contamination-relevant. CDC guidance on environmental cleaning flags high-touch surfaces as a priority. Phones belong in both categories.
WHO Hand Hygiene Guidelines; CDC Environmental Cleaning GuidanceOne hospital study found 99.3% of smartphone screens contaminated. Another found 97.8%, including 9.5% MRSA. Across literature reviews, contamination rates in the 40 to 60 percent range are commonly reported.
Loyola et al. (2021); Simmonds et al.Phones travel between patients, rooms, and staff. The organisms found on them, including MRSA, Enterococcus, and Acinetobacter, are clinically relevant. That turns a dirty screen into a potential transmission pathway.
Systematic reviews; Ulger et al.; Goldblatt et al.Sterra Health makes single-use disposable covers for shared desk phones and personal smartphones. Each cover creates a clean barrier between the device and the user, without adding steps to an already demanding shift.
The goal is not to replace existing cleaning protocols. It is to close a gap those protocols were not designed to address: the phone that moves room to room, hand to hand, without anyone stopping to wipe it down.
The evidence points to a consistent gap. Sterra makes a product designed to close it without adding steps to your team's workflow.
See the ProductReview the sources and supporting evidence behind Sterra’s infection-risk framing.