To understand “viruses” or anything related to diseases and medicines logically and scientifically, one needs to study and understand the actual science (chemistry subject). But unfortunately, “experts” ignore this aspect and make false and fraudulent claims.
Considering a fundamental understanding of the science subject, it was clear (and described) from the beginning of the pandemic that there is no virus, testing is false, and vaccines have to be fake and potentially dangerous.
So, when you hear medical/pharmaceutical experts on the topics, keep the above-mentioned thought in mind; most narratives will be fake and false.
The following will help in clarifying the issues.
COVID-19: The virus does not exist – it is confirmed! (link)
(Video) Virus, COVID, pandemic, vaccine, and testing: fiction, not reality or science! (link)
Science for the pandemic at the authorities: false in fact fraudulent – requires urgent action! (link)
Facts and data-based science (link)
An M.D. degree is not a science degree! (link)
And much more here (link)