It should be noted that the burden is not normally put on anyone to prove that a drug is ineffective or unsafe. The burden is to prove that a drug is both safe and effective, before it can be put into general use.
The FDA has a very specific set of procedures and protocols to be followed to establish that a drug is both safe and effective before it can legally be put into general use. This process is non-trivial, and takes several years to complete. Until this process is complete, a drug is considered experimental, and may only be given to those who have given informed consent to be used as medical test subjects.
Due to the ersatz “emergency” manufactured out of the #CoronaHoax2020, a special authorization was given to put the dangerous, experimental mRNA shit into general use, without it having been through the necessary process of being tested and proven to be safe and effective. Everyone who has received these drugs has been used unwittingly and illegally, as a medical test subject, in clear violation of the Nuremberg code. At this point, a growing body of empirical evidence seems to cast serious doubts both on the safety and efficacy of this mRNA shit; and to suggest that if it was subject to the normal procedures for testing new drugs, that it would ultimately fail to ever pass the required standards, or to be approved for general use.