Since the virus has had a major effect on much life, we would like to have some information on how many people have had

[answerhappygod]

Since the virus has had a major effect on much life, we would
like to have some information on how many people have had it, have
it or do not have it. How would you design a study? Would you use a
variable measurement that is nominal, ordinal, interval, ratio or a
combination of these? Would you obtain your random sample using an
study based on an observational, experimental, simulation,
published data or a survey using a stratified, clustered,
systematic or convenient technique? Please explain.