Received: 19 January 2021
Accepted: 24 January 2021
First Online: 1 February 2021
Ethics approval and consent to participate
: COVID-Simile study Presentation Certificate for Ethical Appreciation (CAAE) number is 30638220.0.0000.0008, which was approved by the Brazilian National Research Ethics Commission (CONEP) on May 31<sup>st</sup>, 2020 (report # 4.059.759).Ethical approval is available at:ExternalRef removed [Portuguese]. Please click on <i>“Confirmar Aprovação pelo CAAE ou Parecer”</i> (Confirm Approval by CAAE or report #. The system only shows approved protocols.Informed Consent (IC) is presented and explained during recruitment by telemedicine. Two counterparts of the IC (pre-signed by the principal investigator) are sent to the participant’s home address, through a delivery company, which returns the signed IC to the study centre, completing the Inclusion process.
: Not applicable.
: The authors declare that they have no competing interests.Cesar AT is co-owner of HN-Cristiano Homeopatia, the pharmacy that has donated the study medication, however, <i>Natrum muriaticum</i> has been in use for over 150 years and is not patentable.