Ronald Ross returned to England in 18 to enroll in a diploma course in public health. At the same time, he continued to pursue literary and musical hobbies during his leisure time. After completing his diploma course, he got married the following year and returned to Bangalore with his wife.
In addition to working in a military hospital, he turned his attention to research into the process of malaria transmission.
Source
In his first published research paper, he opined that any toxins from mosquito bites are transmitted from mosquitoes to human blood, causing malaria. Already a French physician named Charles Laveron has discovered the malaria parasite as the cause of malaria. Although the information was published in the Indian Medical Journal, Ronald Ross could not agree. Whoever he saw in front of him would take a few drops of blood from his finger and look at it under a microscope for a long time.Once in the blood of a healthy-sick person, there are small crescent-shaped creatures that Laveron mentions in his research paper.
After testing the blood of many people day after day, he became angry when he did not find the crescent-shaped malaria parasites in Laverne. He began to think that the parasites might have been in the blood of a malaria patient used in the study. These parasites may have no association with malaria. He also thinks that Charles Laveron may have deliberately misinformed.
He set out to disprove Laveron's information. He may not have been able to see Mr. Laveron's parasites because of a microscope defect. He also insisted that he would not accept Laveron's research until the parasites were found. Ronald lost interest in the work again and became frustrated.Colleagues found out about his plight and suggested that he meet with Patrick Manson, a physician in London, to discuss tropical diseases such as malaria. Manson was considered a skilled physician. So Ronald returned to England in 1894 on a second leave of absence from the military.