Case 4: SARS-CoV-2 attack on a vaccinated person for the first time or reinfecting a patient for the second time.
What would happen if a person has recovered from COVID-19 and received a vaccine against the virus? Another significant finding, according to Quantum Perturbation Theory, is a link between repeated COVID-19 attacks and immunity responses.
Assume that a person has recovered from the first attack of coronavirus and is suffering for a certain time from COVID-19. Quantum Perturbation Theory prescribes that this person can be affected by the COVID-19 again. However, this time the attack may not be as severe as the first time because the body has developed an affinity and the immunity system has got the strength and has already recognized the virus to resist strongly. The reduced effect of COVID-19 on this person is given by the first-order correction to the energy of the perturbed system. There would not be an unperturbed energy effect this time. Since the first-order correction to the energy is very small, therefore, the second attack on a person will be very weak as well and the person will recover soon. Mathematically, the effect of COVID-19 on a person being suffered the second time is given mathematically by,
Strength of second attack of COVID-19 attack on a personEn(1) = < Ψn(0)│H p│Ψn(0) > / < Ψn(0)│Ψn(0)>
If a person got a vaccine against coronavirus, then this person can still be suffered from COVID-19. In this situation, like the above case of second attack, the effect of COVID-19 will be weak and is represented by the first-order correction to the energyEn(1) = < Ψn(0)│H p│Ψn(0) > / < Ψn(0)│Ψn(0)>
Figure 5 shows how the effect of Covid-19 is tremendously reduced after vaccination.