In the year 1849 By the terms of the New Passenger Act, 12 & 13 Vict., c.33, no passenger-ship is allowed to proceed until a medical practitioner appointed by the emigration office of the port shall have inspected the medicine-chest and passengers, and certified that the medicines etc are sufficient, and that the passengers are free from contagious disease.
The master, owner, or charterer of the ship is bound to pay the medical inspector the sum of £1 sterling for every 100 persons thus inspected. When the emigrant and his family have undergone this process, their passage-ticket is stamped, and they have nothing further to do, until they go on board, but to make their own private arrangements and provide themselves with outfits, or with such articles of luxury or necessity as they may desire over and above the ships allowance.
All persons who may be discovered to be affected with any infectious disease, either at the original port of embarkation or at any port in the United Kingdom into which the vessel may subsequently put, are to be re-landed, with those members of their families, if any, who may be dependent upon them, or unwilling to be separated from them, together with their clothes and effects.
Passengers re-landed are entitled to receive back their passage-money, which may be recovered from the party to whom it was paid, or from the owner, charterer, or master of the ship, by summary process, before two or more justices of the peace.
It worked in 1849 why not now? Notice there was no government officers involved.