TY - JOUR T1 - Two Worlds T2 - Emerging Infectious Disease journal PY - 1999 VL - 5 IS - 1 SN - 1080-6059 AB - KW - DO - 10.3201/eid0501.ac0501 UR - https://wwwnc.cdc.gov/eid/article/5/1/ac-0501_article ER - End of Reference