I checked 4 links at the Nature source. All of them opened to their stories, but I know if all will open without a subscription.
Science Takes On a Silent Invader (quagga mussels and zebra mussels)
Progress Against Hepatitis C, a Sneaky Virus
Middle Eastern Virus More Widespread Than Thought
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I don’t have a subscription but I was able to access an article.
Crystallography is a wonderful technique, but not every molecule can be crystallized.
I earned my PhD by studying a protein that is too unstable to be crystallized. Its structure had to be deduced by other methods. Everyone in the lab got excited when someone managed to crystallize a small part of a similar protein, because it gave us clues as to the real structure of “our” protein...