system
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human
Change all the verbs in this article to past tense.
Relevant data:
'Scientists reveal that the new vaccine shows promising results in clinical trials. The treatment reduces the severity of symptoms and speeds up recovery time. The research team plans to continue their investigation to confirm the vaccine's effectiveness.'
gpt
Scientists revealed that the new vaccine showed promising results in clinical trials. The treatment reduced the severity of symptoms and sped up recovery time. The research team planned to continue their investigation to confirm the vaccine's effectiveness.