Can I apply vicks to my 20 days old daughter on her chest? She has got some cold and cough and sore throat (even I have the same)

If you have baby vicks then you can apply that too in diluted form. Mix it with Vaseline jelly and use.. The other one which we adults use is not recommended for kids below 5. You can put drops of eucalyptus oil on your baby's clothes, that may help.