Chest infections are caused by germs-viruses, bacteria.

Take the next dose exactly one month after today and I think you should get an extra dose a month afterwards as well. No matter how full your hands are kindly KNOW THAT THE MINIMUM INTERVAL between VACCINATION that have repeat doses is usually ONE MONTH

The normal PCV range for 2-3 months old is 28-41%.

Since the drugs were prescribed by a doctor, please follow his instructions.

Low PCV... Low PACKED CELL VOLUME AKA BLOOD levels is called ANAEMIA aka shortage of blood... There are many causes of anaemia... Though malnutrition is one of them especially if the food is deficient in iron and folic acid and vitamins... There are other causes that have nothing to do with food.