The reason for the increase is the pandemic.
Macques were extremely important in the development of covid vaccines and then more research was done on macques during a period, says Karin Loré, vaccine researcher at Karolinska institutet to Vetenskapsradion.
Last year, 52 uses of macques in Swedish animal experiments were reported.
Karin Loré does not think that animal experiments with monkeys will continue to increase, but rather return to previous levels. She also hopes that AI will be a future tool for vaccine development, for example by helping to find out what side effects a vaccine has.