Algorithm 1.

Algorithm for proposed Extreme Regression-Voting Classifier (ER-VC)

Input:SYMPTOM_TEXT

Output: Vaccinated individual ← not survived or recovered or not recovered

Procedure: Data Splitting

Training_Samples = (SYMPTOM_TEXT, Labels)

Testing_Samples = (SYMPTOM_TEXT)

Training_Samples, Testing_Samples

Procedure: Voting Classifier

voting_criterion= ”soft”

L=Logistic_Regression(Training_ Sample)

E=Extra_Tree(Training_ Sample)

Procedure: Predictions made by L

P(L) ← Testing_samples

P(L)=l1,l2,l3, ,ln

Procedure: Predictions made by E

P(E) ← Testing_samples

P(E)=e1,e2,e3, ,en

Final_Prediction ← argmax ${\sum }_{i=0}^n(P(L)+P(E))$