EXPLAINERS
The WHO stated that "there is no evidence that the Bacille Calmette-Guérin vaccine (BCG) protects people against infection with COVID-19 virus". Hence, it is best to disregard this claim; until, sources of repute proclaim after much research and substantial findings say otherwise.
While gargling saline solution is effective against sore throats- a symptom of SARS-Cov2- it does not cure the infection!