Algorithm 1: The assessment of medication effects in Omicron patients (see Figure 1 for flowchart)

▹ Start

▹ Input Stage :

$—$1. Consider $\mathcal{Z}$ as universe of discourse.

$—$2. Consider ${\Theta }^1$ as subset of set of parameters.

$—$3. Classify parameters into disjoint parametric valued sets ${\Theta }_1,{\Theta }_2,{\Theta }_3$.

▹ Construction Stage :

$—$4. Construct $\Theta ={\Theta }_1\times {\Theta }_2\times {\Theta }_3$.

$—$5. Construct iv-FHSSs $\left({{\tilde{\mathcal{F}}}^{ivf}}_{HS},\Theta \right)$, $\left({{\tilde{\mathcal{G}}}^{ivf}}_{HS},\Theta \right)$

▹ Computation Stage A :

$—$6. Compute $d_{Eu{c}_A}=d_{Euc}\left(\left({{\tilde{\mathcal{F}}}^{ivf}}_{HS},\Theta \right),\left({{\tilde{\mathcal{G}}}^{ivf}}_{HS},\Theta \right)\right)$.

$—$7. Compute $d_{Ha{m}_A}=d_{Ham}\left(\left({{\tilde{\mathcal{F}}}^{ivf}}_{HS},\Theta \right),\left({{\tilde{\mathcal{G}}}^{ivf}}_{HS},\Theta \right)\right)$.

$—$8. Compute $d_{Ha{u}_A}=d_{Hau}\left(\left({{\tilde{\mathcal{F}}}^{ivf}}_{HS},\Theta \right),\left({{\tilde{\mathcal{G}}}^{ivf}}_{HS},\Theta \right)\right)$.

$—$9. Construct iv-FHSSs$\left({{\tilde{\mathcal{H}}}^{ivf}}_{HS},\Theta \right)$

$—$10. Compute $d_{Eu{c}_B},d_{Ha{m}_B}$ and $d_{Ha{u}_B}$.

▹ Output Stage A :

$—$11. If $d_{Eu{c}_B}<d_{Eu{c}_A}$, $d_{Ha{m}_B}<d_{Ha{m}_A}$ and $d_{Ha{u}_B}<d_{Ha{u}_A}$ hold or if at least two inequalities hold then the patient is recovering and needs an omicron test. If the test report is negative then stop medication and discharge; otherwise, go to next stage.

$—$12. If one inequality holds or all inequalities become untrue then change medicine and go to stage I.

▹ Computation Stage B :

$—$13. Construct iv-FHSSs $\left({{\tilde{\mathcal{J}}}^{ivf}}_{HS},\Theta \right)$

$—$14. Compute $d_{Eu{c}_C},d_{Ha{m}_C}$ and $d_{Ha{u}_C}$.

▹ Output Stage B :

$—$15. If $d_{Eu{c}_C}<d_{Eu{c}_B}$, $d_{Ha{m}_C}<d_{Ha{m}_B}$ and $d_{Ha{u}_C}<d_{Ha{u}_B}$ hold or if at least two inequalities hold then the patient is recovering and needs omicron test. If test report is negative then stop medication and discharge otherwise repeat medication.

$—$16. If one inequality hold or all inequalities become untrue then change medicine and go to stage I.

▹ End