Innovation and Knowledge Sharing Can Transform COVID-19 Infection Prevention Response

Strategies to navigate the PPE shortage in the era of COVID-19 include importing, reclaiming, reusing, and repurposing PPE; generating and extending supply; eliminating nonessential services; reducing patient contact; and using nonhuman services such as drones to deliver equipment and undertake tasks such as decontamination.^9,10 Multidisciplinary teams are working on creative ways to use existing resources to make effective PPE, including alternatives to N95 respirators. An outbreak simulation study at Emory University in Atlanta, Georgia, and the University of Texas Health Science Center at Houston in Texas demonstrated that HCWs could be rapidly trained and fit tested to use elastomeric half-mask respirators, which are reusable.¹¹ A multidisciplinary team at Boston Children’s Hospital in Massachusetts has developed and completed a small pilot study of a reusable elastomeric respirator made using an anesthesia facemask, antimicrobial filter, and elastic straps.¹²

Given evidence that suggests that COVID-19 involves a component of airborne transmission,¹³ in addition to droplet spread and surface (fomite) contamination,¹⁴ using known infection prevention techniques that work to decrease airborne transmission of other respiratory infectious diseases should also be considered. Germicidal ultraviolet (GUV) air disinfection rapidly disinfects upper room air, which is then continually exchanged with contaminated lower-room air. GUV air disinfection has been demonstrated to be a safe and cost-effective intervention, with an efficacy of approximately 80% for decreasing TB transmission.¹⁵ GUV air disinfection is also effective against airborne influenza and measles and may play a role in surface decontamination by accelerating viral inactivation. Enabling GUV in high-risk areas such as the emergency department or intensive care unit could be a high-yield intervention to decrease transmission of COVID-19.

HCWs exposed to other respiratory infections such as influenza or TB may receive preventive therapy to reduce the risk of developing disease. High rates of COVID-19 in HCWs have prompted several initiatives to evaluate innovative approaches to decreasing this risk. Multiple studies are underway to determine whether hydroxychloroquine could be used for pre- or postexposure prophylaxis to prevent COVID-19. Another multisite trial will evaluate whether the BCG vaccine, primarily used to reduce the risk of TB, provides protection against COVID-19 in HCWs, driven by data suggesting a correlation between universal BCG vaccination policy and reduced morbidity and mortality for COVID-19.¹⁶

Infection prevention efforts can benefit from the unprecedented amount of data on COVID-19 that is being generated and shared. Successful examples of the rapid intensification of infection prevention measures to decrease transmission in healthcare facilities should be emulated. The hospital authority of Hong Kong implemented a bundle of measures focused on early recognition, isolation, notification, and molecular diagnostics for people being evaluated for COVID-19.¹⁷ They subsequently broadened the clinical and epidemiological criteria of surveillance as the outbreak evolved and intensified PPE recommendations to all HCWs (face masks for all and N95 respirators for those performing aerosol-generating procedures), which appears to have resulted in no cases of HCW infection or nosocomial transmission.

Data characterizing the extent of occupational infections in HCWs during acute and chronic epidemics is often lacking and subject to wide variability in reporting, which limits its impact. For example, HCWs in high TB incidence countries have at least twice the risk of developing TB, compared with the general population. Although there are still major gaps in national data collection regarding the incidence of occupational TB, recent attempts by WHO to systematically record this data have resulted in increasing prioritization of this group as an at-risk population who may benefit from TB preventive therapy. We strongly advocate that health systems systematically record and share longitudinal data on numbers of HCWs infected with COVID-19. This transparency will facilitate urgent action to replenish and sustain resources such as PPE and enable institutions to share and adapt successful infection prevention strategies. Examples such as the prevention of central line- associated bloodstream infections demonstrate the potential impact of national collaborative efforts to strengthen infection prevention, although further effort is needed to optimize knowledge sharing in the context of outbreaks.