Prevent Epidemics of Blood-borne Infections by Assuring Safe Shots of COVID-19 Vaccines
HIV, Hepatitis B virus (HBV) and hepatitis C virus (HCV) are blood- borne infections (BBIs) readily spread by injection equipment contaminated with blood and other body fluids. Exposures to unsafe injections during health–care are the leading cause of new HCV infections globally. Improvements in infection control by clinical care systems and use of auto-disable (AD) syringes by pediatric immunization programs reduced the risk of HCV infection and other BBIs. However, the rapid introduction and scale-up of COVID-19 vaccination in low-and middle-income countries (LMICs), while a welcomed addition to the pandemic response, pose new risks for exposures to blood contaminated injection equipment and the resurgence of BBIs. Leading public health officials recently raised concerns regarding injection safety of COVID-19 vaccination programs (1).
At least three factors increase the potential for unsafe injections during mass COVID-19 vaccination particularly in low and middle income countries (LMICs). First, the supply of auto-disposable syringes might not meet the demand for COVID-19 vaccination. Over the remainder of 2021 and through 2022, an estimated 15 b-19 b doses of COVID-19 are expected to be delivered. This number of vaccinations will require massive increases in syringe supply, distribution with ready availability at the site of vaccination.
While models estimate existing supplies of AD syringes are sufficient in the short term, more production of AD syringes is needed to meet demands for COVID-19 vaccination in 2022. UNICEF Executive Director Henrietta Fore has expressed concern regarding the coming shortage of COVID-19 vaccine syringes particularly for LMICs where auto-disposable syringes are critical for injection safety (2). Dr. Matshidiso Moeti, director of the WHO regional office in Africa recently raised this alarm: “Unless drastic measures are taken to boost syringe production, Africa faces a crisis." (3)
Secondly, syringe production is complex for COVID-19 vaccines. Different syringes are needed to deliver vaccine doses which vary by type of COVID-19 vaccine. The Pfizer-BioNTech vaccine requires 0.3-mL dose. This syringe is made by a limited number of manufacturers with no reserve in a global stockpile. The Oxford-AstraZeneca vaccine and others require 0.5-mL doses. As AD syringes are typically designed to provide a preset 0.5-ml dosage only, additional manufacture of a 0.3 mL dose is needed to meet the demand for this type of syringe while avoiding declines in production of 0.5 mL syringes.
Thirdly, the rapid scale-up of COVID-19 vaccination can exceed the capacity of current pediatric and adolescent vaccination programs; most countries do not have adult vaccination programs. Governments will seek to rapidly achieve high immunization coverage among adults. In most countries, public demand for vaccination is high. To achieve high COVID-19 vaccination coverage will often require recruitment of adult care providers and other clinical staff who have not previously participated in vaccination programs. These staff must receive training in injection of vaccinations. The demands on governments and their vaccination programs can also place pressure to use available vaccines even if injection safety is compromised. Dr. Sabin Nsanzimana, director-general at the Rwanda Biomedical Centre, recently reported some vaccines are received less than a month before expiration (3).
To mitigate the transmission risks of BBIs, COVID-19 immunization campaigns must assure a reliable supply of safe injection equipment, and the program management and clinical training to assure COVID-19 vaccines are safe.
Necessary steps to assure safe injections of COVID-19 vaccines include:
- COVID-19 vaccination programs must develop a budget-based COVID-19 vaccination plan with procurement and distribution systems in place to match the supply of injection equipment with the scale up of COVID-19 vaccination.
- COVID-19 vaccination programs must have the expertise to develop appropriate injection safety policies with technical assistance available upon request.
- COVID-19 vaccination programs must have oversight to assure safe injection practices.
- COVID-19 vaccinators must be trained in safe injection practices and waste management.
- COVID-19 vaccination programs must collect data to monitor injection safety practices, identify lapses in practices, investigate potential exposures to BBI and implement corrective actions.
- Unicef, Gavi and other key stakeholders should assist COVID-19 vaccine programs in development and evaluations of safe injection programs.
- COVID-19 vaccination programs should participate in a community of practice to disseminate information regarding injection safety protocols and to share lessons learned.
The Task Force for Global Health can create a community of practice for national COVID-19 vaccination programs to share their injections safety plans, procedures and evaluations.
1) Chan M, Dzau V, Jha A, Hunt J, Kelley E, Zeltner T. The global vaccine effort will be a hollow victory if it leads to unsafe injection practices. Washington Post. July 19, 2021 https://www.washingtonpost.com/opinions/2021/07/19/global-vaccine-effort-would-be-hollow-victoryif-it-leads-unsafe-injection-practices/ accessed October 28,2021
2) Urgent action needed now to ensure sufficient COVID vaccine syringe supply to meet 2022 vaccination targets. Unicef https://www.unicef.org/press-releases/urgent-action-needed-now-ensuresufficient-covid-vaccine-syringe-supply-meet-2022 accessed October 28, 2021
3) Jerving J. Looming syringe crisis threatens COVID-19 vaccine efforts in Africa, Devex. https://www.devex.com/news/looming-syringe-crisis-threatens-covid-19-vaccine-efforts-in-africa101948?access_key=&utm_source=nl_newswire&utm_term=article&utm_content=cta&mkt_tok=Njg1L UtCTC03NjUAAAGAarIOICftu4p4DMHzRQ2mZKHx-DfvbcSzWConANB1EBcoaDakMnVvmHPS8pzqo2Oe_9HPSLXTwqV3onH4lVn27mFNx86Rldq9f898fLH8PHLNuY accessed October 28,2021