Hand foot and mouth

Grace 🦋 pcos 🌻 👧🏻👧🏼👼🏼

My niece got hand foot and mouth on thanksgiving and then passed to to her brother . They still have the sores so I’m nervous being around them with my kids . Their dr said once the sores stop oozing they aren’t contagious and apparently confirmed her kids aren’t . But online says they shouldn’t be around kids till the sores are gone and they can be contagious for weeks . My sister in law was asking to hang out and I told her we don’t feel comfortable if they still have the sores . But we are all supposed to get together this weekend . I don’t know who to believe . What she said her dr said or what is online saying other things . Has anyone gone through this and how long is it contagious .