id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-263658-dlmzcl9g	MCINTOSH, KENNETH	SEROEPIDEMIOLOGIC STUDIES OF CORONAVIRUS INFECTION IN ADULTS AND CHILDREN(1)	1970-06-17		.txt	text/plain	2572	139	52	authors: MCINTOSH, KENNETH; KAPIKIAN, ALBERT Z.; TURNER, HORACE C.; HARTLEY, JANET W.; PARROTT, ROBERT H.; CHANOCK, ROBERT M. Table 1 shows the proportion of infants and children with and without LRTD showing fourfold or greater antibody responses to the three related coronavirus antigens OC38, OC43, and MHV, strain A-59. It is evident from the studies of hospitalized children that infection with coronaviruses was not significantly associated in this survey with pediatric lower respiratory tract disease. It is of interest that in the seroepidemiologic studies of Hartley and others, where several strains of MHV were tested with sera from military recruits, no epidemiologic association of MHV or MHV-like virus infection with respiratory tract disease was made (11) . Antigenic studies of human coronaviruses have shown that those members of the group which were originally recovered in tissue culture are all closely related to the prototype virus strain 229E (2, 5) .	./cache/cord-263658-dlmzcl9g.txt	./txt/cord-263658-dlmzcl9g.txt