Ay sis, honestly at 1 month old it's better to check with your pedia muna bago mag-swab, some doctors prefer to wait a bit longer para sure na ready na ang baby's immune system, pero it really depends on kung bakit kailangan ng swab. A few of us moms, ang doctors namin eh hinahanap-hanap muna ang dahilan before recommending it, kasi ang newborns talaga ay sensitive pa. Better safe than sorry, so if your doctor says it's necessary, then go na, they know best! Sending you strength, first-time mommy!