I would refrain from having your puppy walk on grass that is accessible to other dogs until all the shots are completed. If it's in your back yard and you are certain no other strange dogs have been in the yard, then back yard is ok. Just make sure warm clothes and dry them off when you come back in.
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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