Airborne Formula. How accurate are they?

Any of you taken Airborne Formula - *Effervescent Health Formula tablets? It's like a shot of Vitamin or dietary supplement. I am wondering if they are really that suitable and if they really stop the sickness if taken during the first sign of sorethroat, muscle ache (flu) or cold. Do share. i TRYED THE OFF BRAND, AND IT WORKED FOR THAT DAY, I RAN OUT, BUT IVE TAKEN IT LIKE EVERY 4 HRS, FOR ABOUT 3 DAYS AND IT DID KICK IT. iTS ABOUT 1000MG OF VITAMIN C
They work really economically. I like them and use them repeatedly