Comment on

• A retrospective examination of sporozoite- and trophozoite-induced infections with Plasmodium falciparum: development of parasitologic and clinical immunity during primary infection.

  Collins WE, Jeffery GM. Collins WE, et al. Am J Trop Med Hyg. 1999 Jul;61(1 Suppl):4-19. doi: 10.4269/tropmed.1999.61-04. Am J Trop Med Hyg. 1999. PMID: 10432041
• A retrospective examination of secondary sporozoite- and trophozoite-induced infections with Plasmodium falciparum: development of parasitologic and clinical immunity following secondary infection.

  Collins WE, Jeffery GM. Collins WE, et al. Am J Trop Med Hyg. 1999 Jul;61(1 Suppl):20-35. doi: 10.4269/tropmed.1999.61-020. Am J Trop Med Hyg. 1999. PMID: 10432042
• A retrospective examination of sporozoite- and trophozoite-induced infections with Plasmodium falciparum in patients previously infected with heterologous species of Plasmodium: effect on development of parasitologic and clinical immunity.

  Collins WE, Jeffery GM. Collins WE, et al. Am J Trop Med Hyg. 1999 Jul;61(1 Suppl):36-43. doi: 10.4269/tropmed.1999.61-036. Am J Trop Med Hyg. 1999. PMID: 10432043
• A retrospective examination of the patterns of recrudescence in patients infected with Plasmodium falciparum.

  Collins WE, Jeffery GM. Collins WE, et al. Am J Trop Med Hyg. 1999 Jul;61(1 Suppl):44-8. doi: 10.4269/tropmed.1999.61-044. Am J Trop Med Hyg. 1999. PMID: 10432044