In a report that was accompanied with the medical journal JAMA given by Dr. Randell Swanson who is also the co author of the journals paper stated that if any person with these symptoms is put into a brain injury clinic without knowing their background, the doctors would be of the impression that the person had a traumatic brain injury for sure. Per the report, the affected diplomatic person reported to be feeling the sensations coming out a particular direction which is actually not possible at this point of time for the determination of dose and duration of exposure. This is because the limitations of patient recall and conflicting accounts.
As noted by CNN, the government of Cuba completely denies involvement of any kind of attacks but still some of the members of the Senate Foreign Relations Committee which included Senator Marco Rubio and Bob Menendez raising questions whether this is credible or not. Marco Rubio in particular told CNN that the idea of such an attack in Havana could be conducted by anyone without attracting the attention of security and intelligence agencies of Cuba was actually outside the fact of being reasonable. On the other hand, Rubio had been much quicker for the identification of possible preparatory than the doctors have been able to identify what might have actually happened and the recent improvement in the relations between US and Cuba have deteriorated rapidly.