וְכֹ֛ל אֲשֶׁר־יִגַּע־בּ֥וֹ הַטָּמֵ֖א יִטְמָ֑א וְהַנֶּ֥פֶשׁ הַנֹּגַ֖עַת תִּטְמָ֥א עַד־הָעָֽרֶב׃ (פ)
And whatsoever the unclean person toucheth shall be unclean; and the soul that toucheth him shall be unclean until even.
Read kabbalistic (mystical) interpretation of Numbers 19:22: and classical mystical sources.