>> it has been literally hell. >> reporter: just as americans gather for the holidays, the nation is being gripped by a tripledemic of respiratory illnesses, code, the flu and rsv. the cdc estimates there have already been 15 million flu cases with nearly every part of the country reporting high or very high levels. >> this is the season it is hitting hard and early. >> reporter: some reported difficulty finding cold and flu medicine and children's pain killers. covid cases are also surging, though not as high as last year. the white house is once again providing americans with free tests at c...