The Society for Immunisations and Travel Medicine on Friday said Hong Kong people should take different jabs, in accordance with their travel destinations.
The society interviewed over 100 people this month, and found that 85 percent of them would not get jabbed, even if they were going to high-risk places.
Its president, Alex Leung, urged people to have a health consultation four to six weeks before their departure.
"Travel health is not just about vaccination, it's about the whole package of travel health risk assessment. It's about what is the chemoprophylaxis... emergency medications," he said.
Leung said, for example, there are currently pneumonia outbreaks in Indonesia and the Philippines, while places like Japan, South Korea and Thailand recorded outbreaks of flu.
Infectious diseases expert Ivan Hung said having flu and pneumococcal infections at the same time is very common, and it may increase the possibility of hospitalisation and the death of patients.
"Pneumococcal disease... which previously [was] not believed to be a traveller's disease, is now being highlighted that certain people will have this risk of acquiring this kind of infection and developing complications," he said.
The society said people can refer to its vaccine guidelines, targeting popular destinations among Hong Kong travellers.