If 磷狀病毒 means Rotavirus, then Rotavirus (taken orally) at 2, 4 and 6 months and cannot be taken after 8 months old. If it's taken at 1 yr old in HK and you want to take it, u better take it in HK.
don't worry about the credit check for renting.
u could show your hubby's pay check stub to the landlord and ask his HR for an employment verification letter showing his salary income.
for extended-stay hotels, i usually stayed at Residence Inn or TownePlace Suites hosted by Marriot. TownePlace Suites is a little lower grade than Residence Inn so it's cheaper. There's a TownePlace Suites in Milpitas right across from the Great Mall where is within walking distance so it's more convenient if not driving. It might take 20 minutes to Sunnyvale if traffic is good.
they both provide full kitchen and utensils.
ask your hubby to check with his company to see if they offer any corporate rate for the extended stay hotel or apartment.