Scientists at the University of East Anglia say they're working on a new way of finding the bacteria and viruses associated with cancer.
Some infections have already been linked with cancers including stomach cancer and cervical cancer.
Lead researcher Dr Brewer, from UEA's Norwich Medical School said: "There is already an HPV vaccine which is thought to prevent around 70 per cent of cervical cancer cases.
'We hope that by identifying bacteria and viruses associated with other cancers, new vaccines could be developed in the future."
The research was carried out in collaboration with Genomics England's 100,000 Genomes Project and the Earlham Institute. It was funded by the Big C cancer charity.
Dr Brewer continued: "When tumour samples are whole-genome sequenced, DNA from any pathogens present will also be sequenced, making it possible to detect and quantify pathogens.
"This gives us a fantastic opportunity to collect data that will help us find new associations between bacteria and viruses and different types of cancer."
Researchers say they hope their work could help detect cancer-causing germs, and one-day even lead to more cancer vaccines like the HPV vaccine.