I'm in California,the sister is in Dominican republic.sister goes to school and works something with government.for us tourist she needs to get vaccinated? For vac she didn't get an email,I'm sure for interview they send an email.for my wife situation they sent email for vac and interview,find it odd."She can take proof of as many ties as possible to her home country" like what can she bring? Bank statements ? Letter from employer that she's getting a 2 week break from job?