id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-261073-s0qpiovr	Ehrengut, W.	A two year serological surveillance of coronavirus infections in Hamburg	1980		.txt	text/plain	1356	81	52	The occurrence of OC-43 coronavirus-like infections in the population of Hamburg was determined by a monthly serological survey (hemagglutination inhibition test [HI]) undertaken between October 1974 and October 1976. Serological surveillance carried out at regular intervals on a large number of sera taken from representative groups reveals the total infection rates (apparent and non-apparent) and the level and distribution of the seroimmunity in the population. The following report of seroepidemiological studies of coronavirus infections is based upon observations made in the course of a surveillance programme in Hamburg (carried out since October 1974) in various sections of the population in which all age groups were represented. Serological study of coronavirus antibodies in Hamburg Occurrence of antibody against coronavirus (OC43) in the healthy population and in patients with a disease of the respiratory tract Seroepidemiologic survey of coronavirus (Strain OC 43) related infections in a children's population	./cache/cord-261073-s0qpiovr.txt	./txt/cord-261073-s0qpiovr.txt