midoy
The only reason they could reject the medicals is because your medical is not in accordance with the EK's medical requirement. A few people had been rejected due to non-fulfilment on the medical requirements...i.e. Hepatitis A & B, HIV positive, low haemoglobin, bad hearing, infectious diseases...etc. So the golden call doesn't mean anything yet far until your medical is approved and clearance check is done (final approval).
EK is extremely strict with the cabin crew health profile, obviously they don't want sick people on board serving passengers.
Regards to all.