Thanks to 15FiberFrenzy for helping me to get started on this poncho. Based on her photo and starting chain length, I was able to begin. Below are more detailed instructions on how to start the poncho.
Round 1: Start with Ch 90, sl st last ch into first ch, ch 1, sc into same space. Ch 7, sk 5 ch, sc into next ch, (ch 4, sk 1 ch, then sc into next ch)x3, * ch 7, sk 5 ch, sc into next ch. (Ch 4, sk 1 ch, sc into next ch)x3. (Ch 7, sk 5 ch, sc into next ch)x2, (ch 4, sk 1 ch, sc into next ch)x3. * Repeat from * to * once more. Ch 7, sk 5 ch, sc into next ch. (Ch 4, sk 1 ch, sc into next ch)x3. Ch 7, sk 5 ch, sl st into beg ch from Ch 90.
Round 2: Ch 3 (counts as dc), 9 dc into ch 7 loop, (sc into ch 4 loop, ch 4)x2, sc into last ch 4 loop. Continue with 10 dc’s into each ch 7 loop and sc and ch 4 into the ch 4 loops. At end of round, sl st last dc into top of beg Ch 3.
Proceed with virus shawl directions, beginning each round with Ch 3 (counts as dc) and sl st at end each of round.
Finished shawl with chain 3 picots. Lined neckline with twisted single crochet. Measurement: 55” across from tip of one corner to opposite flat edge.
6/29/16: If you wanted to make this a smaller poncho, you can start with a shorter chain count for the opening, but you still have to get it around your head, so don’t go too short (perhaps 80 chains). Using a smaller hook would help as well, such as 5 mm. Also, doing fewer repeats will make it not as long, which would be better for a more petite or shorter person. And of course, using a thinner weight yarn will help it be a bit smaller and not blocking it out quite so aggressively either will help it not to grow so much.