Results for your kindly is much appreciated translation from English to Indonesian

the fatality rate is much higher for those over 70 but significantly lower for those under 40.
angka fatalitas jauh lebih tinggi bagi orang yang berusia di atas 70, tetapi secara signifikan lebih rendah untuk orang yang berusia di bawah 40.

thus, the current outbreak of covid-19 is much more severe and difficult to control than the outbreak of sars.
dengan demikian, wabah covid-19 saat ini jauh lebih parah dan sulit dikontrol daripada wabah sars.

however, covid-19 has lower severity and mortality than sars but is much more transmissive and affects more elderly individuals than youth and more men than women.
meski demikian, covid-19 memiliki tingkat keparahan dan mortalitas yang lebih rendah dibandingkan sars, tetapi lebih menular dan lebih banyak mengenai lansia daripada orang muda, serta lebih banyak pada pria daripada wanita.

thus, it is much more challenging to control the epidemic of sars-cov-2 than those of mers-cov and sars-cov.
karena itu, tantangan untuk mengontrol pandemi sars-cov-2 lebih besar daripada pandemi mers-cov dan sars-cov.