In Norway, some children developed narcolepsy after being vaccinated with Pandemrix. The average time from vaccine (or influensa) until developing narcolepsy was 8 months.
You could use US Intl. keyboard layout and use RAlt+z/l/w for æ/ø/å. If you have a QMK Firmware keyboard you could even reprogram it to use Alt + '/;/[ to send these keys and you'll have æ/ø/å in the usual position.