The "perfect" vaccines target DNA viruses; DNA viruses are incredibly slow to mutate, whereas RNA viruses, such as those that cause the common cold, mutate very rapidly. So, IF (major IF) there actually is a SARS-Cov-2 virus, a coronavirus, it is an RNA virus. Therefore, by the time you develop, produce, and distribute a jab, the bug is …
The "perfect" vaccines target DNA viruses; DNA viruses are incredibly slow to mutate, whereas RNA viruses, such as those that cause the common cold, mutate very rapidly. So, IF (major IF) there actually is a SARS-Cov-2 virus, a coronavirus, it is an RNA virus. Therefore, by the time you develop, produce, and distribute a jab, the bug is already different from the one you built the jab for. As Fast Eddy notes, leaky vaccines force mutation. Not a good idea to deploy leaky vaccines, unless your goal is to produce leaky vaccines for variant after variant in a never ending cash parade.
The "perfect" vaccines target DNA viruses; DNA viruses are incredibly slow to mutate, whereas RNA viruses, such as those that cause the common cold, mutate very rapidly. So, IF (major IF) there actually is a SARS-Cov-2 virus, a coronavirus, it is an RNA virus. Therefore, by the time you develop, produce, and distribute a jab, the bug is already different from the one you built the jab for. As Fast Eddy notes, leaky vaccines force mutation. Not a good idea to deploy leaky vaccines, unless your goal is to produce leaky vaccines for variant after variant in a never ending cash parade.