DHD showed a decreasing trend until 2012, and then increased thereafter.
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The sentences
In general, the proportion of DHD in the MSM transmission cases showed an increasing trend, from 14.3% in 2007 to 25.6% in 2018, while that in the heterosexual contact cases decreased from 43.8% in 2007 to 28.5% in 2011, and thereafter increased to 41.4% in 2018.