infections also infections and diseases infections and infestations infections are also infections are caused infections are common infections are most infections are not infections are often infections are treated infections are usually infections associated infections can infections can also infections can be treated infections can cause infections can lead infections can occur infections cause infections caused infections caused by bacteria infections could infections do infections due infections have infections in adults infections in animals infections in children infections in dogs infections in humans infections in patients infections include infections lead infections linked infections may infections occur infections of the skin infections of the upper infections often infections per year infections result infections tend infections that can infections that cause infections usually infections when infections will infections worldwide infectious infectious agent infectious agents infectious and non-infectious infectious and parasitic diseases infectious bacteria infectious bronchitis infectious cause infectious causes infectious complications infectious diarrhea infectious disease infectious disease caused infectious disease control infectious disease outbreaks infectious disease prevention infectious disease research infectious disease specialist infectious diseases infectious diseases can infectious dose infectious hepatitis infectious laugh infectious material infectious materials infectious mononucleosis infectious organisms infectious particles infectious pathogens infectious process infectious processes infectious respiratory infectious salmon infectious smile infectious substances infectious syphilis infectious units infectious viral infectious virus infectious waste infective infective dose infective endocarditis infective larvae infectivity infects infects humans infeed infeed conveyor infeld infer