Hi,

you may try ViPR website which provides updated virus genome sequences and tools for blasting, aligning or for primer design

https://www.viprbrc.org/brc/home.spg?decorator=vipr

You could also check for primer specificity using NCBI Primer Blast :

https://www.ncbi.nlm.nih.gov/tools/primer-blast/

If you use

http://insilico.ehu.eus/

you can upload you own list of sequences in FASTA format (eg found in GenBank) and perform in silico PCR on these

(you have to copy/paste the url since its not working directly for some reason)

you can try

in silco PCR amplification

http://insilico.ehu.es/PCR/

especially those related to viruses appeared at the interface