Letters Do Antimalarial Sprays Explain Declining Death Rates? + See all authors and affiliations Science 17 Jan 1964:Vol. 143, Issue 3603, pp. 197-198DOI: 10.1126/science.143.3603.197-a Harald FrederiksenFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.