From the CDC, all past issues are available freely online. This journal publishes a wide variety of article types, including primary research articles, "Research", review articles, commentary, book reviews, etc.
Malaria Journal publishes primary research articles as well as review articles, commentaries and other types of scientific information. Links to malaria news and conference proceedings are also included. Of interest is the section highlighting the most popular papers from the journal.
News related to tropical disease from a wide variety of sources including press releases and journal articles. Look for in-text citations to a journal issue to easily track a story back to its primary source.
Tips for choosing reliable websites
Consider the source. You are looking for reliable scientific information, so the authors of the site should be clearly indicated. You should be able to determine their connection to the scientific research community, and determine what their point of view is.
Consider the audience. Who is reading the site? Scientists? General public? Kids?
Consider how often the site is updated. For some topics, information that hasn't been updated in 5 years may be fine. For other topics, you will need to find more up-to-date information.
Consider other sources. Is the information compatible with information in your textbook or other sources?
Consider why you need the information. A website that is quite fine for giving you a topic idea might not be good as a reference in your paper.