1 Participants with known allergy or contraindication to Vitamin D ,Vitamin K2-7 & Magnesium . <br/ >2 History of having received any investigational drug in the preceding one month. <br/ >3 History of taking any kind of formulation or any other form of therapy for COVID- 19 prophylaxis. <br/ >4 Unwilling to come for regular follow-up for the entire duration of the study. <br/ >5 Any condition that, in the opinion of the investigator, does not justify the subjectâ??s inclusion in the study. <br/ >6 Participants participating in other clinical study. <br/ >7 Participant receiving other immune enhancers. <br/ >8 Refusal to sign informed consent form <br/ >9 Any previous positive test for COVID-19 by RT- PCR <br/ >10 Symptomatic for COVID-19 <br/ >

1 Participants with known allergy or contraindication to Vitamin D ,Vitamin K2-7 & Magnesium . <br/ >2 History of having received any investigational drug in the preceding one month. <br/ >3 History of taking any kind of formulation or any other form of therapy for COVID- 19 prophylaxis. <br/ >4 Unwilling to come for regular follow-up for the entire duration of the study. <br/ >5 Any condition that, in the opinion of the investigator, does not justify the subjectâ??s inclusion in the study. <br/ >6 Participants participating in other clinical study. <br/ >7 Participant receiving other immune enhancers. <br/ >8 Refusal to sign informed consent form <br/ >9 Any previous positive test for COVID-19 by RT- PCR <br/ >10 Symptomatic for COVID-19 <br/ >

N/A

N/A

1 Participants with known allergy or contraindication to Vitamin D ,Vitamin K2-7 & Magnesium . <br/ >2 History of having received any investigational drug in the preceding one month. <br/ >3 History of taking any kind of formulation or any other form of therapy for COVID- 19 prophylaxis. <br/ >4 Unwilling to come for regular follow-up for the entire duration of the study. <br/ >5 Any condition that, in the opinion of the investigator, does not justify the subjectâ??s inclusion in the study. <br/ >6 Participants participating in other clinical study. <br/ >7 Participant receiving other immune enhancers. <br/ >8 Refusal to sign informed consent form <br/ >9 Any previous positive test for COVID-19 by RT- PCR <br/ >10 Symptomatic for COVID-19 <br/ >

1 Participants with known allergy or contraindication to Vitamin D ,Vitamin K2-7 & Magnesium . <br/ >2 History of having received any investigational drug in the preceding one month. <br/ >3 History of taking any kind of formulation or any other form of therapy for COVID- 19 prophylaxis. <br/ >4 Unwilling to come for regular follow-up for the entire duration of the study. <br/ >5 Any condition that, in the opinion of the investigator, does not justify the subjectâ??s inclusion in the study. <br/ >6 Participants participating in other clinical study. <br/ >7 Participant receiving other immune enhancers. <br/ >8 Refusal to sign informed consent form <br/ >9 Any previous positive test for COVID-19 by RT- PCR <br/ >10 Symptomatic for COVID-19 <br/ >