Some children may have a bad reaction to the pertussis vaccine in DTaP and should not take another dose. There is, however, a vaccine called DT that will protect them from diphtheria and tetanus. Talk with your doctor if your child experienced any of the following reactions:
The current price for a forever stamp is .44 cents (2010) so 20 years from now the value of that same stamp will still be .44 cents, even if the price for one ounce is $2 then. So, you would need five forever stamps from this year for 1 ounce in 20 years.
You can use first class Forever Stamps for international mail, but since international prices are higher than domestic prices, you have to add additional postage. The value of the Forever Stamp is the domestic First-Class Mail letter price. So here are your options: First Class International Forever Stamp: $1.15 (as of Dec 2017). That covers 1 ounce.