"While children appear to be at considerably less risk than adults, the risks to children are nonzero, as children may get severe disease and may require hospitalisation."
According to the geological record, the last time the poles switched was ~780,000 years ago, and it has happened about 400 times in 330 million years. Each reversal takes roughly a thousand years to complete. The field has weakened about 10% in the last 150 years. Some scientists think this is a sign of a flip in progress.