Selepas Pendudukan Jepun dan kembalinya pentadbiran British, kadar kematian bayi menurun secara mendadak. Faktor-faktornya ialah peningkatan mutu kesihatan awam dan sanitasi, pengawalan wabak malaria, penambahan inokulasi bayi, pengawasan bidan-bidan (ordinan 1954), penjagaan perubatan dan khidmat nasihat oleh klinik kesihatan ibu dan anak.

Pusat Kebajikan Bayi di Kuala Lumpur, 1954: “5th October 1954, Registration of babies at Babies Welfare Centre during the Activity at Medical Research Institute and Outside Division Building at Kuala Lumpur.” (Jabatan Penerangan Malaysia (JAPEN), 1954 @ UNICEF, 2024: |"UNICEF Malaysia: 70 years of prioritizing children").

Correlation of bottle feeding and jangkitan cirit birit pada bayinfantile gastroenteritis established by Levi and Alexander. Only since this time, doctors and governments became concerned with dangers of bottle feeding.

Supply of manufactured goods disrupted (Japanese occupation) - women had to breastfeed. British Medical Officers associated with improved infant mortality rate.

Situation returned with the British. Limited cow's milk supply through government agencies, so majority infants breastfed. Official correspondence immediately after reinstatement of British Administration: Chief Nutrition Adviser, 1948-11 (10, folio 8): “70,000-80,000 tons of dried milk would be required … for the expectant and nursing mothers, babies and children. Unfortunately the Nutrition Council, because of the cost of even this quantity of milk, feels this amount will have to be reduced still further. THe least additional quantity we can ask for is 10,000 tons … The council recommends that this extra milk should be powdered, skimmed milk since this is probably more easily and cheaply obtained… We believe the importation of extra milk is necessary to prevent disease and unrest in the country.” Regular supply resumed: Advertising returned.