A number of factors go into it but yes the possibility exists, thereafter you are testing to see if it ‘infects’ another with just the spike… the spike is what is tested via PCR…. this is possibly increasing the cases of ‘infection’
https://adarapress.com/2021/06/01/japanese-regulatory-agency-study-vax-spike-protein-concentrates-in-spleen-liver-adrenals-and-ovaries-in-high-concentrations-breast-milk-contaminated/amp/?__twitter_impression=true
https://mobile.twitter.com/AIustitiae/status/1415350019633422337