LACKMAN, DAVID B.; FROMMHAGEN, LAURENCE H.; JENSEN, FLORENCE W.; LENNETTE, EDWIN H.; LACKMAN DAVID B.; Department of Health, Education, and Welfare, Public Health Service, National Institutes of Health, National Institute of Allergy and Infectious Diseases, Rocky Mountain Laboratory; FROMMHAGEN LAURENCE H.; Viral and Rickettsial Disease Laboratory, California State Department of Public Health; JENSEN FLORENCE W.; Viral and Rickettsial Disease Laboratory, California State Department of Public Health; LENNETTE EDWIN H.; Viral and Rickettsial Disease Laboratory, California State Department of Public Health