Cochrane is kind of weird, though it probably is how frequentest science is supposed to work, where the null hypothesis is the default. If you actually followed

Cochrane is kind of weird, though it probably is how frequentest science is supposed to work, where the null hypothesis is the default. If you actually followed their advice you would get vaccinated for hepatitis A every two years, because the protection lasting any longer is "unsupported by high quality sources".