"A meta-analysis, considering the results of several studies together, of a total of 180 participants, by Jessie Hawkins and colleagues at The Franklin Institute of Wellness, 2018, showed that black elderberry is effective and safe for treating viral infections."
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.