covid=covid+covid_19+pandemic+coronavirus+virus+viruses+contagious+infect+infected+infections+infectious+infects+spread+
spreads+outbreak+outbreaks+serious+patient+patients+emergencies+emergency+ambulance+asymptomatic+ambulances+
symptom+symptoms+diagnose+diagnosed+symptomatic+isolate+isolated+isolating+isolation+quarantine+quarantined+quarantines
+dead+deaths+death+die+died+shutdown+shutdowns+curfew
medical=doctor+doctors+medicine+mask+medicines+nurse+nurses+health+care+recover+recovered+recoveries+recovering+
recovers+recovery
travel=aircraft+aircrafts+airfare+airfares+airline+airplane+airplanes+airport+airports+attendant+attendants+pilot+pilots+plane+
cabin+cabins+flight+flights+passengers+vacation+motel+motels+accomodation
vaccine = vaccine + vaccines
uncertainty=uncertain+uncertainty+risk+risked+risky+riskier+riskiest+risking+risks+riskiness
Aggregate=all words in Panel A, Table 1