Hi Welcome to HCM
I have gone thru your query regarding lowering of WBC .
It is not a matter of concern if WBC is low while suffering fom viral or infection at the time of blood check up . Reoccurring
cough periodically may be the cause .
You should get treatment for that and get check up again for your WBC .
You have not mentioned your
WBC count ?
.Normal
white blood cell counts range from 4,500 to 11,000 .
After your treatment from a specialist for your cough , you get wbc checked It should be normal .
I meanwhile , would suggest you to , strengthen your imune system which gives resistance against diseases ,by modifying your life style and food habits by taking diet full of essential nutrients , and supplements - ginger , garlic ,turmeric, lemon ,bitter gourd , nuts all antioxidants and
proper exercise , walk ,
yoga .pranayam ,deep breathing and meditation
Avoid Fried ,fast foods ,Tea , coffee , alcohol ,
smoking , mental
stress ,worry
Constipation .
Above regimen will give you strong immune sustend assure you happy healthy Disease free life ahead . . .
Hope this helps in solving your query .Wish you all the best
Don't hesitate for further query if any .