Table 4.

Key barriers and facilitators to regular booster vaccinations against COVID-19.

Theme (frequency and percentage of responses)	Key Subtheme (frequency and percentage of responses)	Barrier or Facilitator	Exemplar Quotes
Personal Factors(n = 123; 34.9%)	Previous vaccine side effects (n = 26; 21.1%)	Barrier	“ … I was really sick with the booster and that’s off-putting for another vaccine”
	Protect personal health (n = 23; 18.7%)	Facilitator	“Regular top-up of protection for my health”
	Perceived low personal risk (n = 19;15.5%)	Barrier	“Dont think its necessary considering already having 2 jabs”
			“Young so not so worried about health”
	Extra protection from COVID-19 (n = 8; 6.5%)	Facilitator	“As it prevents you being as unwell with covid”
Environmental Factors(n = 97; 27.5%)	Return to normal (n = 22; 22.7%)	Facilitator	“If it was essential go back to typical way of living without masks … ”
			“I want to enjoy my life and if getting a booster every now and then would help then I would”
	Attending activities (e.g., work, social events, holidays; n = 20; 20.6%)	Facilitator	“Continue to attend teaching in-person and physically go to work”
			“If I needed them to go on holiday”
	Inaccessibility of vaccination services (n = 18; 18.6%)	Barrier	“Waiting in long lines, having to take time off work … ”
			“I have to travel far to receive my vaccines which is difficult with my small income and travel abilities”
	Vaccine mandates (work-related and general; n = 14; 14.4%)	Facilitator	“its important for me to have the booster because of my job”
			“If there were lawful consequences to not doing it, I would”
	Inconvenient (n = 9; 9.3%)	Barrier	“Too much hassle”
			“It is an inconvenience”
	Cost (n = 7; 7.2%)	Barrier	“If it remains free”
		Facilitator	“If we had to pay for it or if it was free”
Vaccine or Virus Concerns (n = 77; 21.9%)	Too many doses (n = 18; 23.3%)	Barrier	“It’s getting a bit much now the amount of jags they want the public to get”
			“doesn’t seem right that we would need to receive a vaccine so often”
			“Time between doses, feel as though every 6 months for example is very frequent”
	Potential long-term vaccine effects (n = 13; 16.9%)	Barrier	“Lack of knowledge regarding long term effects”
			“I still feel uncertain about long-term effects such as fertility, I received two doses as it seemed essential but unsure if I would engage in a regular booster”
	Uncertainty of effectiveness of vaccines (n = 11; 14.2%)	Barrier	“Not sure it works”
			“Do they really work?”
	Changes in COVID-19 virus or cases (n = 10; 12.9%)	Facilitator	“If there was a new strain of the virus that was potentially more harmful to health”
			“To keep covid levels down”
Social Factors (n = 55; 15.6%)	Protect health of family and friends (n = 40; 72.7%)	Facilitator	“Ensuring the health of family and friends”
			“My mum is high risk”
	Protect health of others (community members, vulnerable groups; n = 15; 27.3%)	Facilitator	“[if it] keeps the people around me safe then I’m not bothered to take it”
			“Health of those around me who cannot get vaccine”